---
title: "invisible sign -Isu-"
description: "Fifteen years ago main character's older brother Rin got kidnapped. As a result mother went mad and father lost interest in life, so family's private psychiatri"
image: "https://t.vndb.org/cv/79/4479.jpg"
---

# invisible sign -Isu-

![invisible sign -Isu-](https://t.vndb.org/cv/79/4479.jpg)

**Alternative Title:** invisible sign -イス-

**Developer:** lapin

**Release date:** Mar 18, 2005

**Platform:** Windows, Android

**Language:** Japanese, Russian, Chinese (simplified)

**Rating:** 6.0/10 (38 votes)

## Description
Fifteen years ago main character's older brother Rin got kidnapped. As a result mother went mad and father lost interest in life, so family's private psychiatrist had to care of the young Shun. Boy starts to attend school with his only friend. A dreadful murder of student occurs there one day. Shun starts to see visions of the killed student and nightmares where some man wants to catch him. Overcome with fear, he occasionally loses control over his consciousness. A police investigator finds a lot of similarities of this murder with the case fifteen years ago. People around Shun get involved in the investigation, including a classmate girl with the same name as his disappeared brother. Will the mystery be revealed? 

[From [vndbreview](https://vndbreview.blogspot.com/2019/10/vn-of-month-march-2005-parfait-chocolat.html)]

## Characters
### Aizawa Shun (相澤 舜)
- **Gender:** Male
- **Measurements:** Height: 168cm
- **Hair:** Black, Short
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Trousers, Pajamas, Jacket, Necktie, Shirt, Vest, Knee-high Socks, Pendant Necklace, Ribbon Tie, Band-aid
- **Engages in:** Cooking, Teasing, Medication, Fishing
- **Personality:** Boku, Shy, Timid
- **Subject of:** Bullying, Split Personality, Blackmail, Wounding, Teasing, Avoidable Death (obsolete), Hospitalization, Possession, Weakness, Uncontrollable Superpowers, Delusion
- **Role:** Full Brother, Childhood Friend, Classmate, Wealthy, High School Student, Psychic, Half-orphan, Younger Brother
- **Items:** Umbrella
- **Voiced by:** Seki Tomokazu

### Shun (シュン)
- **Gender:** Male
- **Measurements:** Height: 168cm
- **Hair:** Black, Short
- **Eyes:** Brown
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Trousers, Coat, Pajamas, Shirt, Belt, Pendant Necklace, Decorative Belt
- **Items:** Knife
- **Personality:** Ore, Cold-hearted, Short-tempered, Violent, Misogynist
- **Subject of:** Split Personality
- **Role:** Friend, Psychic, Homosexual, Exorcist
- **Engages in:** Murder, Attempted Murder
- **Voiced by:** Seki Tomokazu

### Hayashibara Kensuke (林原 健介)
- **Gender:** Male
- **Measurements:** Height: 178cm
- **Hair:** Brown, Short, Parted to Side
- **Eyes:** Brown
- **Body:** Young-adult
- **Clothes:** Coat, Suit, Necktie, Shirt, Belt
- **Items:** Handgun
- **Personality:** Ore, Emotional
- **Engages in:** Drinking, Investigation
- **Role:** Police, Detective
- **Subject of:** Possession, Turndown
- **Voiced by:** Ogihara Hideki

### Jinnai Ayuri (陣内 あゆり)
- **Gender:** Female
- **Measurements:** Height: 168cm
- **Hair:** Black, Ponytail, Waist Length+, Straight, No Bangs
- **Eyes:** Brown, Grey, Tareme
- **Body:** Pale, Young-adult, Nail Polish
- **Clothes:** Coat, Scarf, Skirt, Lab Coat, High Heels, Miko's Dress, Bracelet
- **Role:** Miko, Psychic, School Nurse
- **Personality:** Kind, Wise, Watashi
- **Voiced by:** Saiga Mitsuki

### Kimura Rin (紀村 凛)
- **Gender:** Female
- **Measurements:** Height: 162cm
- **Hair:** Brown, Twin Tails, Shoulder-length
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Apron, Coat, Jacket, Scarf, Shirt, T-shirt, Vest, Skirt, Jeans, Knee-high Socks, Belt, Bow Tie, Pendant Necklace, Flower, Pleated Skirt
- **Engages in:** Cooking
- **Role:** Full Sister, High School Student, Psychic, Younger Sister, Psychometrist
- **Personality:** Altruistic, Kind, Honest, Brother Complex, Atashi
- **Items:** Mobile Phone, Bag
- **Voiced by:** Yukino Satsuki

### Matsuoka Satoru (松岡 聡)
- **Gender:** Male
- **Measurements:** Height: 186cm
- **Hair:** Black, Short, Spiky, Parted to Side
- **Eyes:** Brown, Hosome
- **Body:** Slim, Pale, Young-adult
- **Clothes:** Trousers, Coat, Suit, Necktie, Shirt, Bandages, Belt, Watch
- **Items:** Handgun
- **Personality:** Ore, Relaxed, Kind, Protective, Brave
- **Engages in:** Drinking, Smoking, Investigation
- **Role:** Police, Detective, Older Brother, Psychometrist
- **Subject of:** Wounding, Avoidable Death (obsolete), Hospitalization, Possession
- **Voiced by:** Nakai Kazuya

### Miyake Makoto (三宅 真琴)
- **Gender:** Male
- **Measurements:** Height: 172cm
- **Hair:** Brown, Short
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Trousers, Jacket, Necktie, Shirt, T-shirt, Belt, Hoodie, Pendant Necklace, Ribbon Tie
- **Subject of:** Amnesia, Coma, Kidnapping, Hospitalization, Homicide
- **Personality:** Ore, Kind
- **Role:** Full Brother, Childhood Friend, Non-blood-related Brother, High School Student, Non-blood-related Son, Ghost, Older Brother, Skeleton
- **Engages in:** Fishing, Possession
- **Voiced by:** Ishida Akira

### Narumiya Hideaki (成宮 英明)
- **Gender:** Male
- **Measurements:** Height: 182cm
- **Hair:** Brown, Curtained, Short, Parted to Side
- **Eyes:** Brown, Grey, Hosome
- **Body:** Slim, Adult
- **Clothes:** Coat, Suit, Scarf, Necktie, Shirt, Belt
- **Role:** Butler, Psychiatrist
- **Personality:** Kind, Protective, Loyal, Serious, Watashi
- **Voiced by:** Aizawa Masaki

### Wakui Haruka (和久井 遼)
- **Gender:** Male
- **Aliases:** ハル, Haru
- **Measurements:** Height: 179cm
- **Hair:** Brown, Short, V Bangs
- **Eyes:** Brown, Grey, Hosome
- **Body:** Pale, Young-adult
- **Clothes:** School Uniform, Trousers, Apron, Pajamas, Earrings, Jacket, Necktie, Necklace, Cross Necklace, Shirt, T-shirt, Jeans, Shorts, Belt, Tank Top, Bow Tie, Pendant Necklace, Sports Uniform
- **Personality:** Hard Worker, Tsundere, Ore, Short-tempered
- **Engages in:** Bullying, Drinking, Smoking, Blackmail, Basketball
- **Role:** Son, Non-blood-related Brother, Classmate, Wealthy, High School Student, Younger Brother, Bad Student, Part-time Worker
- **Subject of:** Bone Fracture, Hospitalization
- **Items:** Mobile Phone, Bag
- **Voiced by:** Toriumi Kousuke

### Yoshinaga Takaya (吉永 貴也)
- **Gender:** Male
- **Measurements:** Height: 182cm
- **Hair:** Brown, Curtained, Short, Parted to Side
- **Body:** Slim, Pale, Young-adult, Tall
- **Clothes:** Trousers, Glasses, Shirt, Lab Coat, Turtleneck Sweater
- **Personality:** Ore
- **Subject of:** Blackmail, Turndown
- **Role:** Teacher, Wealthy, Homosexual
- **Items:** Book
- **Eyes:** Teal
- **Voiced by:** Narita Ken

### Kazuki Setsuya (佳月 雪耶)
- **Gender:** Male
- **Hair:** Black
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Clothes:** Pajamas
- **Engages in:** Suicide, Possession
- **Subject of:** Split Personality
- **Role:** Ghost
- **Personality:** Atashi
- **Voiced by:** Seki Tomokazu

### Maid (メイド)
- **Gender:** Female
- **Hair:** Brown, Odango, Blunt Bangs
- **Eyes:** Brown, Tareme
- **Body:** Teen, Slim, Pale
- **Clothes:** Thigh-high Stockings, Maid's Dress
- **Role:** Maid
- **Items:** Tray
- **Voiced by:** Yukino Satsuki

### Miyake Masae (三宅 雅恵)
- **Gender:** Female
- **Hair:** Brown, Long, Wavy, Short, No Bangs
- **Eyes:** Brown, Tareme
- **Body:** Pale, Adult
- **Clothes:** Jacket, Shirt, Skirt, Turtleneck Sweater
- **Role:** Mother, Non-blood-related Mother, Prisoner
- **Items:** Handbag
- **Engages in:** Kidnapping
- **Voiced by:** Saiga Mitsuki

### Saijou Yoshiyuki (西條 吉幸)
- **Gender:** Male
- **Hair:** Brown, Curtained, Short, Parted in Middle
- **Clothes:** School Uniform, Trousers, Jacket, Necktie, Shirt, Vest
- **Body:** Young-adult
- **Engages in:** Suicide
- **Subject of:** Death, Wounding
- **Role:** High School Student, Ghost

## Shops
- [Official Website](https://web.archive.org/web/20111110210102/http://www.bunnyhole.jp/lineup/is/index.html)

## Releases
### Japanese
- **2005-03-18**: invisible sign -Isu- - [Official website](https://web.archive.org/web/20111110210102/http://www.bunnyhole.jp/lineup/is/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=4538)

### Chinese (simplified)
- **2008-06-20**: Invisible Sign -Isu- - [Official website](http://www.otomedream.com/thread-415254-1-1.html)

### Russian
- **2011-06-18**: Invisible Sign -Isu- - [Official website](https://web.archive.org/web/20110823002300/http://yaoi.desu.ru/files/file/4-invisible-sign-%D0%BF%D0%B0%D1%82%D1%87-%D1%81-%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%BC-%D0%BF%D0%B5%D1%80%D0%B5%D0%B2%D0%BE%D0%B4%D0%BE%D0%BC/)
- **2014-08-10**: Nevidimyi znak -Isu- - [Official website](https://vk.com/visual_android?w=wall-69564393_987)

## Tags
Horror, Mystery, ADV, High School, Male Protagonist, Protagonist with Voice Acting, Multiple Endings, Murder Mystery, No Sexual Content, Protagonist with Multiple Personalities, Detective Work, Ghost, Butler Support Character, Student Protagonist, All-boys School, Lots of Event CGs, Character Profiles, Boy x Boy Romance Only, Homosexual Male Protagonist

## More Games from lapin
- [invisible sign -Isu-](https://pinovel.net/v3672)
- [invisible sign -Isu- Nemureru Mori](https://pinovel.net/v3673)

---
*View the full details at [pinovel.net/v3672](https://pinovel.net/v3672).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v3672#game","name":"invisible sign -Isu-","description":"Fifteen years ago main character's older brother Rin got kidnapped. As a result mother went mad and father lost interest in life, so family's private psychiatri","url":"https://pinovel.net/v3672","image":"https://t.vndb.org/cv/79/4479.jpg","author":{"@type":"Organization","name":"lapin"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"6.0","bestRating":10,"worstRating":1,"ratingCount":38}}
```