---
title: "Anekan ~Onee-chan Kansatsu Nikki~"
description: "Kazuha happens to keep a diary about insects because of science class at school. But he hates insects so choose his older sister as the subject of his observati"
image: "https://t.vndb.org/cv/17/12317.jpg"
---

# Anekan ~Onee-chan Kansatsu Nikki~

![Anekan ~Onee-chan Kansatsu Nikki~](https://t.vndb.org/cv/17/12317.jpg)

**Alternative Title:** あねかん ～おねえちゃん観察日記～

**Aliases:** あねかん～おねえちゃんかんさつにっき, Anekan - Onechan Kansatsu Nikki

**Developer:** Yumemisou

**Release date:** Dec 11, 2006

**Platform:** Windows

**Language:** Japanese

**Rating:** 5.2/10 (7 votes)

## Description
Kazuha happens to keep a diary about insects because of science class at school. But he hates insects so choose his older sister as the subject of his observation. Is he able to complete his diary?

[From [DLsite English](http://www.dlsite.com/ecchi-eng/work/=/product_id/RE027952.html)]

## Characters
### Seo Kazuya (瀬尾 かずや)
- **Gender:** Male
- **Hair:** Brown, Short, Spiky Bangs
- **Body:** Trap, Slim, Pale, Kid
- **Eyes:** Blue, Tareme
- **Role:** Full Brother, Non-blood-related Son, Elementary School Student, Younger Brother
- **Clothes:** Maid's Dress, Clothing with Ribbons, Maid's Headdress, Puffy Sleeves
- **Personality:** Timid
- **Subject of:** Forced Cross-dressing

### Seo Kunie (瀬尾 くにえ)
- **Gender:** Female
- **Hair:** Violet, Ahoge, Shoulder-length, Spiky Bangs
- **Body:** Slim, Pale, Young-adult, Big Breast Sizes
- **Eyes:** Green
- **Clothes:** Miniskirt, Tank Top, Ribbon Tie
- **Personality:** Pervert
- **Role:** Teacher, Non-blood-related Mother
- **Voiced by:** Nagase Yuzuha

### Seo Rika (瀬尾 りか)
- **Gender:** Female
- **Hair:** Brown, Antenna, Ponytail, Waist Length+, Curtained, Spiky Bangs, Parted in Middle
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Miniskirt, Shorts, Thigh-high Stockings, Tank Top, Unusual Hair Ornaments, Sailor School Uniform
- **Eyes:** Violet
- **Role:** Full Sister, High School Student, Non-blood-related Daughter, Older Sister
- **Voiced by:** Nashimoto Yuuri

## Shops
- [Official Website](http://www.yumemisou.net/anekan/index.html)
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ027952.html)

## Releases
### Japanese
- **2006-12-11**: Anekan ~Onee-chan Kansatsu Nikki~ Download Edition - [Official website](http://www.yumemisou.net/anekan/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=8440), [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ027952.html), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0008434/)
- **2006-12-11**: Anekan ~Onee-chan Kansatsu Nikki~ Package Edition - [Official website](http://www.yumemisou.net/anekan/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=8440)
- **2006-12-16**: Anekan ~Onee-chan Kansatsu Nikki~ Trial Edition - [Official website](http://www.yumemisou.net/anekan/download.html)

## Tags
ADV, Blood-related Brother/Sister Incest, Male Protagonist, Teacher Heroine, Shotacon, Nukige, Reverse Rape, High Sexual Content, Group Sex of One Male and Several Females, Student Heroine, Adult Heroine, Big Breast Sizes Heroine, Protagonist's Non-blood-related Mother as a Heroine, Non-blood-related Mother/Son Incest, Shota Protagonist, Ponytail Heroine, Protagonist with a Face, Blowjob, Pegging, Elementary School Student Protagonist, Cowgirl, Non-blood-related Mother/Daughter Incest, Forced Cross-dressing, Straight Shotacon, Perverted Heroine, High School Student Heroine, Protagonist's Older Sister as a Heroine, Protagonist's Full Sister as a Heroine

## More Games from Yumemisou
- [Nijiiro Canvas](https://pinovel.net/v6512)
- [Yumemichou Maho~Jihen](https://pinovel.net/v32899)
- [Anekan ~Onee-chan Kansatsu Nikki~](https://pinovel.net/v9756)
- [Myuu-tan ni Omakase!](https://pinovel.net/v10309)
- [Futaba☆Channel](https://pinovel.net/v6508)
- [Fami:Liar?](https://pinovel.net/v1666)
- [Futaba☆Channel 2](https://pinovel.net/v6509)
- [Futaba☆Channel 2.5](https://pinovel.net/v10260)
- [Lyrical!](https://pinovel.net/v5158)
- [Boku no Yumemiru Mirai](https://pinovel.net/v10544)
- [Oshiete Little Vampire](https://pinovel.net/v6031)
- [Futaba☆Channel 3](https://pinovel.net/v7662)
- [Futaba☆Channel 3.5](https://pinovel.net/v11882)
- [Futaba☆Channel 4](https://pinovel.net/v14327)
- [Futaba☆Channel 4.5](https://pinovel.net/v15799)

---
*View the full details at [pinovel.net/v9756](https://pinovel.net/v9756).*

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```