---
title: "Saimin Seishidou -Secret Lesson-"
description: "The protagonist, Tanaka Hajime, hypnotizes the students and teachers at the school and becomes their \"Sex Counsellor,\" under the guise of sex guidance, he gets "
image: "https://t.vndb.org/cv/30/74030.jpg"
---

# Saimin Seishidou -Secret Lesson-

![Saimin Seishidou -Secret Lesson-](https://t.vndb.org/cv/30/74030.jpg)

**Alternative Title:** 催眠性指導 -Secret Lesson-

**Aliases:** Hypnosis Sex Guidance -Secret Lesson-, 최면성지도 -Secret Lesson-

**Developer:** Dark One!

**Release date:** Dec 20, 2024

**Platform:** Windows

**Language:** Japanese, English

**Rating:** 8.0/10 (146 votes)

## Description
The protagonist, Tanaka Hajime, hypnotizes the students and teachers at the school and becomes their "Sex Counsellor," under the guise of sex guidance, he gets to devour girls everyday. Taking their virginities in front of their boyfriends, he finds pleasure in having sex without the need to worry about any responsibility, spreading his lust all over the school.

And, many more of his schemes are yet to come......

[Translated and edited from the [official website](https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/story.html)]

## Characters
### Tanaka Hajime (田中 はじめ)
A second-year male student who hypnotizes everyone at Seishin Academy and acts as the “sex instructor” on campus. In the name of sex guidance, he takes a bunch of girl's virginity before they have sexual intercourse. He also decides to poison couples as well......

- **Gender:** Male
- **Measurements:** Height: 166cm, Weight: 102kg
- **Body:** Ugly, Overweight, Large Penis
- **Engages in:** Netori (steals the SO), Manipulation, Erotic Mind Control, Mind Control
- **Clothes:** Glasses, Naked in Front of an Audience, School Uniform
- **Personality:** Manipulative, Pervert
- **Role:** School Committee President, High School Student, Father
- **Subject of:** Fake Death

### Aoki Emily (青木 エミリ)
She is a half-Japanese blonde girl with a very cheerful personality. A third-year student at Seishin Academy and a member of the broadcasting club. She is the MC for the school's noon broadcast and is popular with both boys and girls.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page014.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 165cm, Weight: 56kg, Bust-Waist-Hips: 96-58-93cm
- **Eyes:** Red
- **Items:** Microphone
- **Role:** News Presenter, Broadcasting Committee Member, Twelfth Grader, High School Student, Half-Japanese, Popular
- **Hair:** Pubic Hair, Long, Wavy, Blond
- **Clothes:** Micro Bikini, School Uniform, Headphones
- **Subject of:** Sexual Corruption, Pregnancy
- **Personality:** Cheerful, Outgoing, Friendly
- **Body:** Big Breasts
- **Voiced by:** Asaka Natsu

### Fujima Nagisa (藤間 渚)
A second-year student at Seishin Academy and a member of the track and field team. She is a very bright and active tanned girl. She has a [url=/c133967]boyfriend[/url] on the baseball team whom she has just started dating. And before they get to know each other deeply, she has to receive sexual guidance.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page02.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 163cm, Weight: 55kg, Bust-Waist-Hips: 89-56-86cm
- **Role:** School Athletic Club Member, Girlfriend, High School Student, Betrothed, Mother
- **Body:** Tanned
- **Clothes:** Gym Shorts, Sport Bloomers, Sports Bra, Naked in Front of an Audience
- **Hair:** Pubic Hair, Shoulder-length, Brown
- **Subject of:** Sexual Corruption, Netorare (they are the stolen SO), Pregnancy (by illegitimate partner), Pregnancy
- **Personality:** Outgoing, Tomboy, Energetic
- **Engages in:** Infidelity, Lactation
- **Voiced by:** Shippuu Haru

### Himuro Aya (氷室 綾)
A second-year student at Seishin Academy and a member of the track and field club. She is a competitive young lady who sees [url=/c121751]Fujima Nagisa[/url] as her one-sided rival. Nagisa is not particularly competitive, so it's a bit bothersome.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page08.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 167cm, Weight: 58kg, Bust-Waist-Hips: 93-60-94cm
- **Hair:** Claret, Ponytail, Pubic Hair, Long
- **Eyes:** Violet
- **Personality:** Competitive, Desu wa, Arrogant
- **Role:** School Athletic Club Member, Ojousama, High School Student
- **Clothes:** Sport Bloomers, Sports Bra
- **Subject of:** Sexual Corruption, Pregnancy
- **Body:** Big Breasts
- **Engages in:** Athletics
- **Voiced by:** Akashi Yuki

### Mikage Yuuki (御影 友姫)
She is a physical education teacher at Seishin Academy and advises the track and field team. She has a strong temperament and takes pride in not being outdone by men, and she is not pleased with the sexual coaching that the protagonist, [url=/c133970]Hajime Tanaka[/url], is doing.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page01.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 172cm, Weight: 68kg, Bust-Waist-Hips: 96-65-95cm
- **Hair:** Red, Sidehair, Pubic Hair, Shoulder-length
- **Clothes:** Tracksuit, Baby-doll, Sport Bloomers, Sports Shoes, Open Cup Bra, Crotchless Panties, Sports Bra, Naked in Front of an Audience
- **Personality:** Competitive, Stubborn, Tomboy
- **Subject of:** Sexual Corruption, Pregnancy
- **Body:** Big Breasts, Toned
- **Role:** Coach, PE Teacher
- **Voiced by:** Aoi Tokio

### Oribe Mafuyu (織部 真冬)
An English teacher at Seishin Academy and colleague of [url=/c121750]Mikage Yuuki[/url]. She is a married woman with one child. Mikage, her friend, requests her “experienced” advice in order to counter [url=/c133970]Tanaka Hajime[/url].......

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page09.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 170cm, Weight: 64kg, Bust-Waist-Hips: 97-66-98cm
- **Hair:** Parted in Middle, Shoulder-length, Green
- **Eyes:** Violet
- **Clothes:** Maid's Headdress, Glasses, Skirt, Loafers, Maid's Dress, Blouse
- **Subject of:** Sexual Corruption, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO), Pregnancy
- **Role:** Wife, Mother, Teacher, Not a Virgin
- **Body:** Huge Breasts
- **Personality:** Relaxed, Serious, Mature
- **Engages in:** Infidelity
- **Voiced by:** Haruna Ren

### Saikawa Suzu (犀川 鈴)
A second-year student at Seishin Academy. She has a serious and inflexible personality as a member of the public morals committee. She believes that the work of a sex instructor and a public morals officer are naturally conflicting. She constantly complains to her teachers about it....

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page012.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 157cm, Weight: 46kg, Bust-Waist-Hips: 79-55-82cm
- **Role:** Discipline Committee Member, Eleventh Grader, High School Student
- **Eyes:** Violet
- **Personality:** Closet Pervert, Strict, Serious
- **Hair:** Pubic Hair, Shoulder-length, Violet
- **Clothes:** Open Cup Bra, Crotchless Panties, School Uniform
- **Subject of:** Sexual Corruption
- **Body:** Medium Breasts
- **Voiced by:** Tezuka Ryouko

### Sakuraba Karen (桜庭 花蓮)
The mother of [url=/c121752]Sakuraba Mayu[/url] and a housewife. She is very motherly and very close to her daughter. She and her husband have a good relationship, but they do not have an active night-life together due to his demanding schedule.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page06.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 171cm, Weight: 60kg, Bust-Waist-Hips: 98-65-97cm
- **Clothes:** Hair Tie, Wedding Ring, Sweater, Ring
- **Engages in:** Nude Modeling, Remarriage, Fake Relationship
- **Subject of:** Forced Marriage, Sexual Corruption, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO), Pregnancy
- **Hair:** Long, Pink, Side Tail
- **Role:** Wife, Mother, Housewife
- **Personality:** Family Oriented, Kind, Mature
- **Body:** Huge Breasts
- **Eyes:** Pink
- **Voiced by:** Miru

### Sakuraba Mayu (桜庭 まゆ)
A second-year student at Seishin Academy and a member of the art club. She is a girl with a calm and gentle personality. There is a [url=/c133969]boy[/url] in her club that she is interested in, and [url=/c133970]Tanaka[/url] happens to be their go-between......

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page04.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 50kg, Bust-Waist-Hips: 85-58-87cm
- **Engages in:** Nude Modeling
- **Hair:** Pubic Hair, Waist Length+, Tiny Braid, Pink
- **Role:** School Art Club Member, Daughter, Girlfriend, High School Student, Ex-girlfriend, Non-blood-related Daughter
- **Personality:** Friendly, Relaxed, Kind
- **Body:** Big Breasts
- **Subject of:** Netorare (they are the stolen SO), Sexual Corruption, Pregnancy
- **Eyes:** Teal
- **Voiced by:** Igasaki Ayaka

### Sometani Otoha (染谷 乙葉)
A third-year student at Seishin Academy and a member of the news club. She has no sense of justice or understands the spirit of journalism, and is rather selfish. She set her sights on [url=/c133970]Tanaka[/url] in an attempt to get a scoop on him for her own success.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page010.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 52kg, Bust-Waist-Hips: 83-56-85cm
- **Eyes:** Green
- **Personality:** Curious, Selfish, Gossipy, Sly
- **Hair:** Orange, Pubic Hair, Shoulder-length
- **Role:** School Newspaper Club Member, News Presenter, Twelfth Grader, High School Student
- **Subject of:** Sexual Corruption, Pregnancy
- **Body:** Big Breasts
- **Clothes:** School Uniform
- **Voiced by:** Mirau

### Sudou Makoto (須藤 真琴)
A first-year student at Seishin Academy, she is an energetic girl who is a member of the track and field club. She looks up to her seniors, [url=/c121751]Fujima Nagisa[/url] and [url=/c133948]Himuro Aya[/url], and wants to be like them.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page011.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 152cm, Weight: 43kg, Bust-Waist-Hips: 72-54-75cm
- **Role:** School Athletic Club Member, Tenth Grader, Kouhai, High School Student
- **Clothes:** Sport Bloomers, Sports Bra, School Uniform, Strap-on Dildo
- **Hair:** Pubic Hair, Shoulder-length, Black, Violet
- **Subject of:** Sexual Corruption
- **Personality:** Friendly, Tomboy, Energetic
- **Body:** Small Breasts
- **Engages in:** Athletics
- **Voiced by:** Sugihara Matsuri

### Suzumura Kaho (鈴村 香帆)
A third-year student at Seishin Academy and the president of the archery club. She is thoughtful and very feminine. She is best friends with the vice-president, [url=/c121754]Takanashi Shizuku[/url]. Shizuku wants to follow in her example of “femininity".

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page07.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 168cm, Weight: 56kg, Bust-Waist-Hips: 90-58-91cm
- **Eyes:** Blue
- **Clothes:** Hair Ribbon, School Uniform
- **Hair:** Pubic Hair, Black, Side Tail
- **Subject of:** Sexual Corruption
- **Personality:** Friendly, Refined, Kind
- **Role:** Twelfth Grader, School Archery Club Member, School Archery Club President, High School Student, Yamato Nadeshiko, Bisexual
- **Body:** Big Breasts
- **Engages in:** Archery
- **Voiced by:** Isshiki Hikaru

### Takanashi Shizuku (高梨 雫)
A third-year student at Seishin Academy and vice president of the archery club. She is popular with the younger girls, who see her as prince-like. But she herself is a girl to the core who loves cats and cute things. She has a [url=/c133968]boyfriend[/url] who is a member of the boy's archery club.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page03.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 170cm, Weight: 57kg, Bust-Waist-Hips: 89-59-85cm
- **Eyes:** Green
- **Hair:** Pubic Hair, Short, Blue
- **Clothes:** Lace Lingerie, Strap-on Dildo
- **Subject of:** Sexual Corruption, Netorare (they are the stolen SO), Pregnancy (by illegitimate partner), Pregnancy
- **Personality:** Outgoing, Friendly, Cat Person
- **Role:** Girlfriend, School Archery Club Member, High School Student, Popular, Bisexual
- **Body:** Big Breasts
- **Voiced by:** Natsuno Mikoto

### Tsukishima Chihane (月島 千羽)
A first-year student at Seishin Academy, she is [url=/c121753]Yuuki Airi[/url]'s classmate and best friend. She is a beautiful, pure Japanese girl with a reserved personality. Her mother is an accomplished woman in Japanese cooking while also teaching classes on the act of kimono dressing.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page013.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 161cm, Weight: 51kg, Bust-Waist-Hips: 74-58-80cm
- **Hair:** Parted in Middle, Ponytail, Pubic Hair, Long, Black
- **Eyes:** Grey
- **Subject of:** Sexual Corruption, Pregnancy
- **Role:** Tenth Grader, High School Student, Yamato Nadeshiko, Student
- **Body:** Small Breasts
- **Personality:** Refined, Kind, Mature
- **Clothes:** School Uniform
- **Voiced by:** Kazahana Mashiro

### Yuuki Airi (結城 愛莉)
A first-year student at Seishin Academy. She is a studious and serious girl. She entered the school with top grades and had hoped to join the student council, but for some reason she was appointed as an “assistant” to the [url=/c133970]sex instructor[/url].

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page05.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 145cm, Weight: 40kg, Bust-Waist-Hips: 73-52-75cm
- **Clothes:** Baby-doll, Micro Bikini
- **Personality:** Curious, Flustered, Closet Pervert, Smart, Serious
- **Engages in:** Nude Modeling
- **Subject of:** Sexual Corruption, Pregnancy
- **Hair:** Long, Black
- **Role:** Tenth Grader, High School Student, Bisexual, Honor Student
- **Body:** Small Breasts, Short
- **Voiced by:** Aono Musubi

### Aoki Sophia (青木 ソフィア)
[url=/c133966]Emily[/url]'s mother. She is a foreigner.

- **Gender:** Female
- **Hair:** Blond, Long, Wavy
- **Eyes:** Blue
- **Role:** Wife, Mother, Foreigner
- **Subject of:** Pregnancy, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO)
- **Clothes:** Ring, Naked in Front of an Audience
- **Engages in:** Lactation
- **Body:** Huge Breasts
- **Voiced by:** Kazuha

### Fujima Minato (藤間 湊)
[url=/c121751]Nagisa[/url]'s mother.

- **Gender:** Female
- **Body:** Dark, Big Breasts
- **Clothes:** Earrings, Jeans, Naked in Front of an Audience, Bra
- **Hair:** Ponytail, Shoulder-length, Brown
- **Role:** Wife, Mother, Grandmother
- **Subject of:** Netorare (they are the stolen SO), Pregnancy (by illegitimate partner), Pregnancy
- **Eyes:** Brown
- **Voiced by:** Sekita Iori

### Hasegawa Akane (長谷川 茜)
A first-year student at Seishin Academy and a member of the track and field club.

- **Gender:** Female
- **Measurements:** Height: 155cm, Weight: 46kg, Bust-Waist-Hips: 80-55-80cm
- **Role:** School Athletic Club Member
- **Clothes:** Sport Bloomers, Naked in Front of an Audience, School Uniform, Strap-on Dildo
- **Engages in:** Working Out, Sports, Athletics
- **Hair:** Short, Teal
- **Body:** Medium Breasts
- **Personality:** Tomboy
- **Eyes:** Teal
- **Voiced by:** Sakura Mizuki

### Katahira Ayumu (片平 歩)
He is a first-year student at Seishin Academy and a member of the art club. He fell in love at first sight with [url=/c121752]Sakuraba Mayu[/url], his senior in the art club. But he was too shy to confess his feelings. However, his situation changes when he meets [url=/c133970]Tanaka[/url].......

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page017.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 151cm, Weight: 50kg
- **Eyes:** Blue
- **Engages in:** Drawing, Fake Relationship
- **Subject of:** Netori (their SO is stolen), Teasing, Forced Marriage
- **Body:** Small Penis, Short
- **Role:** School Art Club Member, Ninth Grader, High School Student, Ex-boyfriend, Husband, Non-blood-related Father
- **Hair:** Short, Brown
- **Clothes:** School Uniform, Lace Lingerie
- **Personality:** Naive
- **Voiced by:** Kazuha

### Kawashima Yuuko (川嶋 夕子)
A first-year student at Seishin Academy and a member of the girls' tennis club.

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 50kg, Bust-Waist-Hips: 85-60-89cm
- **Hair:** Ponytail, Long, Brown
- **Role:** School Tennis Club Member, Tenth Grader
- **Body:** Big Breasts
- **Eyes:** Shihaku Eyes, Brown
- **Clothes:** School Uniform
- **Voiced by:** Momozono Kaoru

### Komori Hitomi (小森 瞳)
A first-year student at Seishin Academy and a member of the Tea Ceremony club.

- **Gender:** Female
- **Measurements:** Height: 153cm, Weight: 45kg, Bust-Waist-Hips: 83-58-87cm
- **Hair:** Orange, Pubic Hair, Shoulder-length, Side Tail
- **Role:** School Tea Ceremony Club Member, High School Student
- **Body:** Medium Breasts
- **Clothes:** School Uniform
- **Eyes:** Pink
- **Voiced by:** Shippuu Haru

### Kurashiki Reika (倉敷 麗華)
[url=/c146498]Reina[/url]'s mother.

- **Gender:** Female
- **Measurements:** Height: 173cm, Weight: 64kg, Bust-Waist-Hips: 112-65-111cm
- **Hair:** Blond, Long, Wavy
- **Clothes:** School Uniform, Suit, Earrings, Bra
- **Eyes:** Green
- **Role:** Mother
- **Personality:** Arrogant
- **Subject of:** Pregnancy
- **Body:** Big Breasts
- **Voiced by:** Tamiyasu Tomoe

### Kurashiki Reina (倉敷 玲奈)
A second-year student at Seishin Academy and a professional fashion model.

- **Gender:** Female
- **Measurements:** Height: 171cm, Weight: 59kg, Bust-Waist-Hips: 95-57-93cm
- **Birthday:** 10 September
- **Hair:** Blond, Long, Parted to Side
- **Role:** Student, Daughter, Girlfriend, Model
- **Eyes:** Blue
- **Clothes:** Earrings, Gyaru, Naked in Front of an Audience
- **Personality:** Arrogant, Gyaru Speech
- **Subject of:** Pregnancy, Netorare (they are the stolen SO)
- **Body:** Big Breasts
- **Voiced by:** Momozono Kaoru

### Mitarai Akira (御手洗 晃)
The boyfriend of [url=/c121751]Fujima Nagisa[/url], a second-year student at Seishin Academy and a member of the baseball team. In their group of friends, they became attracted to each other and she confessed her feelings for him. However, in the first month of their relationship, they caught [url=/c133970]Tanaka[/url]'s attention and......

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page015.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 175cm, Weight: 71kg
- **Subject of:** Netori (their SO is stolen)
- **Role:** School Baseball Club Member, Boyfriend, High School Student, Betrothed, Non-blood-related Father
- **Hair:** Short, Brown
- **Eyes:** Brown

### Miyajima Sakura (宮島 桜)
A third-year student at Seishin Academy and a member of the kendo club.

- **Gender:** Female
- **Measurements:** Height: 170cm, Weight: 57kg, Bust-Waist-Hips: 96-63-94cm
- **Birthday:** 9 April
- **Hair:** Black, Long, Side Tail
- **Role:** Student, Girlfriend, School Kendo Club President
- **Eyes:** Violet
- **Personality:** Friendly
- **Clothes:** Maid's Dress, Maid's Headdress
- **Subject of:** Pregnancy, Netorare (they are the stolen SO)
- **Engages in:** Kendo
- **Body:** Big Breasts
- **Voiced by:** Kurono Zakuro

### Miyajima Tsubaki (宮島 椿)
[url=/c146581]Sakura[/url]'s mother

- **Gender:** Female
- **Measurements:** Height: 171cm, Weight: 61kg, Bust-Waist-Hips: 108-68-99cm
- **Hair:** Black, Ponytail, Long, Braid
- **Eyes:** Violet
- **Role:** Wife, Mother, Housewife
- **Clothes:** Maid's Dress, Ring, Maid's Headdress
- **Personality:** Refined
- **Subject of:** Pregnancy, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO)
- **Engages in:** Lactation
- **Body:** Big Breasts
- **Voiced by:** Momozono Kaoru

### Nozaki Yuu (野崎 悠)
A third-year student at Seishin Academy and a member of the literary club (though she never goes to it).

- **Gender:** Female
- **Measurements:** Height: 139cm, Weight: 32kg, Bust-Waist-Hips: 70-50-71cm
- **Birthday:** 22 February
- **Hair:** Long, Wavy, Teal
- **Personality:** Lazy, Sleepyhead
- **Role:** High School Student, School Literature Club Member
- **Eyes:** Pink
- **Clothes:** School Swimsuit
- **Body:** Short
- **Voiced by:** Miru

### Obata Natsumi (小幡 夏美)
[url=/c146579]Yui[/url]'s mother

- **Gender:** Female
- **Measurements:** Height: 159cm, Weight: 50kg, Bust-Waist-Hips: 85-58-79cm
- **Hair:** Ponytail, Long, Orange
- **Clothes:** School Uniform, Maid's Dress, Maid's Headdress, Naked in Front of an Audience
- **Eyes:** Amber
- **Personality:** Friendly, Energetic
- **Role:** Mother
- **Subject of:** Pregnancy, Pregnancy (by illegitimate partner)
- **Voiced by:** Nohana

### Obata Yui (小幡 優衣)
A second-year student at Seishin Academy and a member of the basketball club.

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 50kg, Bust-Waist-Hips: 83-57-84cm
- **Birthday:** 5 May
- **Hair:** Shoulder-length, Orange
- **Role:** Student, Daughter, Girlfriend, School Basketball Club Member
- **Eyes:** Amber
- **Clothes:** Maid's Dress, Maid's Headdress, Naked in Front of an Audience
- **Subject of:** Pregnancy, Netorare (they are the stolen SO)
- **Body:** Medium Breasts
- **Voiced by:** Sakura Mizuki

### Sakagami Akeno (坂上 明乃)
A first-year student at Seishin Academy and a member of the Tea Ceremony club.

- **Gender:** Female
- **Measurements:** Height: 148cm, Weight: 38kg, Bust-Waist-Hips: 75-52-73cm
- **Birthday:** 23 October
- **Eyes:** Violet
- **Clothes:** School Swimsuit, Headband, Naked in Front of an Audience
- **Role:** School Tea Ceremony Club Member, Pre-Story Virginity Loss to Protagonist, High School Student
- **Hair:** Long, Straight, Black
- **Personality:** Friendly
- **Body:** Small Breasts
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Aono Musubi

### Shiina Riku (椎名 陸)
A third-year student at Seishin Academy and a member of the archery club. When he was looking for the owner of an abandoned cat, [url=/c121754]Takanashi Shizuku[/url], also a member of the archery club, helped him out. This led him to start dating her.

[From [url=https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/character_page016.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 172cm, Weight: 65kg
- **Subject of:** Netori (their SO is stolen)
- **Hair:** Short, Brown
- **Role:** Boyfriend, Twelfth Grader, School Archery Club Member, High School Student
- **Engages in:** Archery
- **Eyes:** Brown
- **Clothes:** School Uniform

### Tsukishima Kasumi (月島 香澄)
[url=/c133965]Chihane[/url]'s mother.

- **Gender:** Female
- **Hair:** Black, Bun, Long
- **Eyes:** Grey
- **Clothes:** Kimono
- **Role:** Wife, Mother, Teacher, Yamato Nadeshiko
- **Personality:** Strict
- **Body:** Medium Breasts
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Sakakibara Yui

### Yuuki Chigusa (結城 千草)
[url=/c121753]Airi[/url]'s mother

- **Gender:** Female
- **Hair:** Black, Short
- **Body:** Adult, Small Breasts
- **Clothes:** Earrings, Bra, Naked in Front of an Audience
- **Role:** Wife, Mother
- **Subject of:** Pregnancy, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO)
- **Eyes:** Pink
- **Voiced by:** Isshiki Hikaru

## Shops
- [Official Website](https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/index.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1274775)

## Releases
### Japanese
- **2024-11-08**: Saimin Seishidou -Secret Lesson- Trial Edition - [Official website](https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/trial.html)
- **2024-12-20**: Saimin Seishidou -Secret Lesson- Package Edition - [Official website](https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35655), [Getchu](http://www.getchu.com/soft.phtml?id=1274775)
- **2024-12-20**: Saimin Seishidou -Secret Lesson- Download Edition - [Official website](https://nexton-net.jp/ms-toybox/darkone/saiminseishidou/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35655), [DMM](https://dlsoft.dmm.co.jp/detail/next_0407/)

### English
- **2025-11-18**: Saimin Seishidou -Secret Lesson-
- **2026-09**: Saimin Seishidou -Secret Lesson- [AI TL] - [Official website](https://htranslations.com/community/channel/d625af8a-4527-48c5-9841-37b529c8a41f)

## Tags
High School, Male Protagonist, Teacher Heroine, Heroine with Glasses, High Sexual Content, Group Sex of One Male and Several Females, Pregnancy, Pregnant Sex, Protagonist with Glasses, Heroine with Sexual Experience, Netori, Married Heroine, Erotic Mind Control, Unlockable Harem Ending, Perverted Protagonist, Protagonist with a Face, Defloration, More Than Seven Heroines, Impregnation, Chubby Protagonist, High School Student Protagonist, Ugly Protagonist, Student Club Member Heroine, Harem Ending with Theme, Infidelity, P.E. Teacher Heroine, Pregnancy Ending, Butterfly, Sex in Front of an Audience, Heroine's Mother as a Heroine, French Kiss, Based on a Manga, Single Blowjob, Anal Sex, High School Student Heroine, Heroine with Big Breasts, Bathroom Sex, Lesbian Sex, Maid Cosplay, Adult Breast Sucking, Strap-on Dildos, Heroine with Tights, Cat Cosplay, Oyakodon, Threesome Ending, Nukige, Hero(ine) Selection

## More Games from Dark One!
- [Saimin Gakushuu -Secret Desire-](https://pinovel.net/v29779)
- [Sakusei Byoutou ~Seikaku Saiaku no Nurse Shika Inai Byouin de Shasei Kanri Seikatsu~](https://pinovel.net/v30235)
- [Sakusei Byoutou ~Jaaku naru Otsubone Nurse ga Hisomu Byouin de Choukyou Seikatsu~](https://pinovel.net/v32706)
- [Sakusei Byoutou ~Kyouaku Naru Kangoshichou ga Shihai suru Byouin no Shin'en e Sennyuu Sousa~](https://pinovel.net/v36663)
- [Boku Iro Ni Somaru Oba](https://pinovel.net/v44186)
- [TO-RA-WA-SE ~Toraware no Anata ga Yumemiru Shiawase~](https://pinovel.net/v43468)
- [Saimin Seishidou -Secret Lesson-](https://pinovel.net/v41351)
- [Kimi wa Yasashiku Netorareru -Lustful betrayal-](https://pinovel.net/v54601)
- [Elf Hime Kaikoroku ~Shoufu Hime to Boukoku no Yume~](https://pinovel.net/v55886)
- [Sakusei Byoutou R -Seikaku Saiaku Nurse ga Boku no Seishi o Kongan Suru Gyakuten Nyuuin Seikatsu-](https://pinovel.net/v59023)
- [Reijuu no Acolyte Lufia](https://pinovel.net/v61334)

---
*View the full details at [pinovel.net/v41351](https://pinovel.net/v41351).*

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