---
title: "Boku One ~End of Summer Days After~"
description: "Mizusawa Nachi, a young man captivated by the beauty and kindness of a woman named Amagi Rina, experiences his first love. Despite their slight age difference, "
image: "https://t.vndb.org/cv/85/122385.jpg"
---

# Boku One ~End of Summer Days After~

![Boku One ~End of Summer Days After~](https://t.vndb.org/cv/85/122385.jpg)

**Alternative Title:** ぼくおね～End of Summer Days After～

**Developer:** bootUP!

**Release date:** Apr 30, 2021

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 7.2/10 (44 votes)

## Description
Mizusawa Nachi, a young man captivated by the beauty and kindness of a woman named Amagi Rina, experiences his first love. Despite their slight age difference, Nachi and Rina share a close bond akin to siblings, enjoying their days together. However, their relationship takes a turn during a shared bath when Nachi can no longer resist his desires and confesses his love to Rina, embracing her.

Following the confession, their relationship evolves into a forbidden affair, filled with secret rendezvous after school, concealed from their parents. They promise to keep their relationship a secret. Their love deepens, and Nachi envisions marrying Rina in the future. However, their lives are disrupted by a deadly global virus outbreak, causing Rina's father's company, Tenjou Foods, to face financial troubles. As a result, Rina is forced to move to Tokyo.

Before leaving, Rina reveals her desire to have a child with Nachi, hoping it would allow them to stay together. They consummate their love, but the next day, Rina disappears without a word, leaving Nachi heartbroken. Time passes, and Nachi successfully gains admission to Tokyo's prestigious university, seeking to find his lost love.

[Translated from [Getchu](https://www.getchu.com/soft.phtml?id=1121698)]

## Characters
### Mizusawa Nachi (水沢 那智)
- **Gender:** Male
- **Aliases:** なぁ君, Naa-kun
- **Hair:** Black
- **Role:** Husband, Father, Son, Office Worker
- **Personality:** Kind, Protective
- **Engages in:** Wedding, Marriage Proposal
- **Body:** Large Penis

### Amagi Rina (天城 里奈)
A childhood friend who lives directly across the street from the main character, Nachi Mizusawa. 
Her father runs the largest local food company, Tenjou Foods, and she is the daughter of the president. She is an only child and has no siblings.

She is a kind, quiet, beautiful, and talented girl with good grades, her personality make her easy to get to know and sit down with. She is wealthy and modest, and does not give off an air of superiority. She has a good appearance, and above all, she has beautiful large breasts, which are said to be the best in school.

She loves the main character whom she has known since childhood, since they live across the street from each other. She treats him as if he were her own younger brother. she is unaware that she spoils Nachi because of her nature. 

Because her house is close to the beach, she and Nachi have been going to the beach for a long time. 
She loves swimming and is good at it. She wanted to join the school swimming club but didn't considering the home circumstances of both her and Nachi. Instead, she invited Nachi to join a swimming club at a nearby public pool about three days a week after school.

Because she is the daughter of the Tenjou Foods, few boys have confessed their feelings for her, and all the boys who did were rejected. Her reason for refusal is that deep down she is angry that Nachi hasn't made a move yet.

[From [url=https://www.bootup.jp/products/bokuone/chara01.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 93-60-88cm, H cup
- **Hair:** Black, Ponytail, Long, Straight, Parted to Side
- **Body:** Teen, Slim, Pale, Big Breasts
- **Clothes:** School Uniform, Dress, Shorts, Knee-high Socks, Maid's Dress, Tank Top, Bikini, Nightgown, Loafers, Cheerleading Uniform, Micro Bikini, Open Cup Bra, Slingshot Micro Bikini
- **Role:** Student, Childhood Friend, Wealthy, School Swimming Club Member, Ane Act
- **Eyes:** Violet
- **Personality:** Deredere, Friendly, Kind, Baby Complex, Humble
- **Engages in:** Swimming, Moving
- **Subject of:** Forced Marriage
- **Voiced by:** Fujino Murasaki

### Amagi Rina (天城 里奈)
The business of Tenjou Foods, which was run by her father, rapidly deteriorated.  Part of the business was transferred to a Tokyo-based company known as “Sakunamite", Her family moved to Tokyo in order to revive the business. However, Tenjou Foods went bankrupt with only the food distribution division being taken over.

The dream of reviving the business completely disappears. Rina's father becomes ill, due to continued heartache and the shattering of his dreams. Rina is admitted into college, but life is hard having to work, take care of her father, and study.

Then, Yasuhito Sakurada, one of the grandsons of the chairman of “Sakunamite,” takes a shine to her and asks her to marry him. At first, Rina refused, but Yasuhito offered financial support, suggesting that she could stay at home as a full-time housewife without having to work part-time and could instead take care of her father.

Completely exhausted both physically and mentally, and considering her father's worsening health, Rina accepted Yasuhito’s marriage proposal and became his wife.

They leave their shabby apartment and are welcomed into Yasuhito's home as his wife, and begin to live together as husband and wife. However, within three months of their union, she discovered that Yasuhito had several mistresses. When asked about it, Yasuhito responded that he could do whatever he wanted with his money. Rina began regretting how easily she agreed to the marriage. Although dissatisfied, she continued caring for her father.

Yasuhito's behaviour continued to get worse by the day, and would not return home for days at a time. To add insult to injury, her father is diagnosed with liver cancer. All sorts of medication and surgeries were tried, but it had already metastasized and was too late for him. 6 months after diagnosis, he had passed away.

With Rina's father now gone, she feels suffocated living with Yasuhito and leaves home to live separately. The relationship has fully deteriorated. Rina returns to her shabby apartment, but Yasuhito does not agree to divorce, rather he wants to keep her as part of his mistress collection. Rina is unsettled by this, not knowing what his intentions are.

Rina thought that she needs to continue living for her parents who had passed away unexpectedly, and that running away from the painful reality would not solve anything. She is determined to make a new life for herself. Rina reunites with Nachi who had been searching for her, and the two begin a new life with each other.

[From [url=https://www.bootup.jp/products/bokuone/chara02.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 97-63-93cm, J cup
- **Hair:** Black, Ponytail, Long, Straight
- **Body:** Slim, Pale, Young-adult, Huge Breasts
- **Personality:** Hard Worker, Kind, Baby Complex, Family Oriented, Resilient
- **Eyes:** Violet
- **Clothes:** Jeans, Sport Bloomers, Chinese Dress, Tank Top, One Piece Swimsuit, Naked Apron, Hair Tie, Baby-doll, Bunny Dress, Ankle Socks, Micro Bikini, Open Cup Bra, Crotchless Panties, Sling Bikini, Sports Bra, Lace Garter Belt Stockings, Sleeveless Sweater, Sleeveless Turtleneck Sweater
- **Role:** Divorcee, Mother, Domestic Partner, Not a Virgin, Office Worker, Ane Act
- **Subject of:** Pregnancy, Marriage Proposal
- **Engages in:** Lactation, Wedding, Remarriage, Bunnygirl Cosplay
- **Voiced by:** Fujino Murasaki

### Mizusawa Nami (水沢 那美)
Nachi's mother. She works with her husband Satoshi in the Product Development Department of Tenjou Foods, and has always supported him at work.

She has a strong personality and is well-known for her ability to get things done at work, but she is not a cold-hearted career woman at all, but rather a warm-hearted person who motivates others. She sometimes worries that she could not take care of her son Nachi because she and her husband were both working, but Rina, the daughter of the president of Tenjou Foods and a neighbor, took care of Nachi, so she continued to work with her husband even though she felt sorry for him.

Rina, who had often come to visit Nachi, was like a daughter to her, and she had strong trust in her, feeling safe leaving her only son, Nachi, in her care. The couple had been active together, but when Tenjou Foods went bankrupt, they decided to quit their jobs and devote themselves to housework. Nachi devotes himself to his studies and martial arts as if he were possessed by something.

[From [url=https://www.bootup.jp/products/bokuone/chara04.html]official site[/url]]

- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 87-65-90cm, G cup
- **Personality:** Hard Worker, Friendly
- **Role:** Mother
- **Engages in:** Not Sexually Involved
- **Subject of:** Guilt
- **Voiced by:** Hoshi Riruka

### Mizusawa Satoshi (水沢 智史)
Nachi's father. A junior colleague of Rina's father's at university, he was the head of the product development department of Tenjou Foods. 

He is a calm and collected man who cared about his colleagues and subordinates, and was trusted by Rina's father, the president. However, he was unable to take effective measures in the face of a far greater-than-expected recession. As a result, he regrets his inability to do anything about the situation and is acutely aware of his own inability to do anything about it. 

He is deeply regretful of his inability to do anything about the situation, and is painfully aware of his own power. He understands Nachi's feelings after Rina's disappearance, and despite the opposition and concerns of those around him, Nachi devoted himself to his studies and the dojo, and he watches Nachi's actions without saying a word.

In order to help Nachi, who had decided to go to Tokyo to look for Rina, he visited Tokyo several times over the weekend and obtained information on his own, and told him that Rina was still living in Tokyo and that she had married the third son of the president of Sakunamite.

Nachi, who was indeed upset about her marriage to the third son but still wanted to see Rina with a strong will in his eyes, agreed to go to Tokyo.

[From [url=https://www.bootup.jp/products/bokuone/chara03.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 168cm
- **Personality:** Hard Worker, Family Oriented
- **Role:** Father, Father-in-law
- **Engages in:** Not Sexually Involved
- **Subject of:** Guilt
- **Voiced by:** Tsukuda Sadei

### Onodera Takuto (小野寺 拓斗)
Nachi's boss, who graduated from university with excellent grades and has been employed at the Tokyo branch of Kirishima Heavy Industries. Although still young, he is a successful businessman who is the head of the Quality Control Department. He has an intuitive ability to recognize latent talent in others. He spots Nachi, who had just joined the company and is brimming with talent, and begins to favor him.

He is the grandson of Hayato Kirishima, the current CEO of Kirishima Heavy Industries, a global company. He is the third son of [url=https://vndb.org/c31685]Onodera Takumi[/url] and [url=https://vndb.org/c33015]Kirishima Mizuki[/url]. He is a super thoroughbred with a direct Kirishima bloodline, but due to his parents' policy and Takuto's own will, he joined the company on the basis of his ability alone, without the help of his familial connections.

Takuto's fearless personality and business acumen were on full display soon after he joined the company, and he quickly made a name for himself, he was transferred to the Quality Control Department of the Tokyo Branch Office, where he demonstrated his overwhelming talent to the fullest. He was selected as a department manager in his fifth year with the company. 

His grandfather Hayato Kirishima, invited him to work at the head office in the Kozuma region, but he turned down the invitation, saying he had not won the position by his ability.

He has a friendly personality without being arrogant, and he and Nachi have more of a brother-brother relationship than a boss-subordinate relationship.  He is an important figure who will influence the future of Nachi and Rina, Nachi's love interest.

[From [url=https://www.bootup.jp/products/bokuone/chara06.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 176cm
- **Personality:** Hard Worker, Friendly, Kind, Smart
- **Role:** Son, Grandson, Wealthy, Executive, Ani Act
- **Engages in:** Not Sexually Involved
- **Voiced by:** Yuuki Asahi

### Sakurada Yasuhito (桜田 康仁)
One of the grandsons of the chairman of a major food company headquartered in Tokyo and the current president of the company. He is a man of medium height and medium build with a mild-mannered air about him but his nature is rotten and he takes pleasure in deceiving and playing tricks on others. 

He spends his days in debauchery, begging not only his parents but also his grandfather for money.  He has the cunning to take full advantage of his parents' and grandfather's money and status.  He met Rina at a meeting with Tenjou Foods and fell in love with her at first sight. Since then, he has persistently asked Rina for a relationship, taking advantage of his superior position.

He was frustrated that Rina was not interested in him at all, but he took advantage of her father's illness to ask her to marry him. At first, he was delighted by Rina's voluptuous body and became addicted to her, but he began to get bored with her somewhat cold reaction and started to have lovers outside the house.

Rina was patient at first, but when he began to bring his mistresses into the house, she could not stand it any longer and moved out. They became separated, and since they had no children together, Rina asked for a divorce. However, Yasuhito did not agree to the divorce and continued to maintain their marital status.

[From [url=https://www.bootup.jp/products/bokuone/chara05.html]official site[/url]]

- **Gender:** Male
- **Measurements:** Height: 167cm
- **Subject of:** Assault, Disownment
- **Role:** Divorcee
- **Personality:** Arrogant, Womanizer
- **Engages in:** Infidelity, Not Sexually Involved
- **Voiced by:** Hatsugai Yukika

## Shops
- [Official Website](http://www.bootup.jp/products/bokuone/index.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1344220)

## Releases
### Japanese
- **2021-04-30**: Boku One ~End of Summer Days After~ Regular Edition - [Official website](http://www.bootup.jp/products/bokuone/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=30546), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=796335), [Getchu](http://www.getchu.com/soft.phtml?id=1121698)
- **2021-04-30**: Boku One ~End of Summer Days After~ Download Edition - [Official website](http://www.bootup.jp/products/bokuone/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=30546), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0327/)
- **2021-04-30**: Boku One - Tsuika DLC #1 "Ai Land Beach" - [Official website](https://www.bootup.jp/products/bokuone/dlc.html#dlc_01), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32361), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0329/)
- **2021-05-28**: Boku One - Tsuika DLC #2 "Cosplay Tengoku 6" - [Official website](https://www.bootup.jp/products/bokuone/dlc.html#dlc_02), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32362), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0330/)
- **2021-06-25**: Boku One - Tsuika DLC #3 "Cosplay Tengoku 7" - [Official website](https://www.bootup.jp/products/bokuone/dlc.html#dlc_03), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32363), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0331/)
- **2021-09-16**: Boku One ~End of Summer Days After~ - DVDPG - [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=h_107npg415/)
- **2025-10-16**: Boku One ~End of Summer Days After~ - Low Price Edition DVDPG - [Getchu](http://www.getchu.com/soft.phtml?id=1344220)

## Tags
ADV, Romance, Oneesan-type Heroine, Male Protagonist, Multiple Endings, Deredere Heroine, Protagonist's Childhood Friend as a Heroine, Nukige, Only a Single Heroine, Student Heroine, Early Sexual Content, Pregnant Sex, Other Perspectives, Defloration, Sex in Public Places, Only Virgin Heroines, Summer, Missionary Position, Internal Exhibition of Sex, Impregnation, Lactation During Sex, Only Good Endings, Cunnilingus, Doggy Style, Armpit Sex, Female Ejaculation, Outdoor Sex, Few Choices, Bleep Censor, Kissing Scene, Quickie Fix Position, Blowjob Duck Face, Reverse Piledriver, Armpit Licking, Visible Cervix Penetration, Time Jump, Only Older Heroines, Heroine with Baby Complex, Adult Breast Sucking, Sex on a Beach, Nursing Handjob, Pregnancy Good Ending, Single Boobjob, Single Blowjob, Sex with Protagonist Only, Heroine with Huge Breasts, Heroine with Big Breasts, Pillow Talk

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---
*View the full details at [pinovel.net/v30170](https://pinovel.net/v30170).*

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```