---
title: "Seichou Nikki ~Onii-chan to Yobasetai!~"
description: "Main character needs to foster and grow customizable heroines throughout the year.  [From vndbreview]"
image: "https://t.vndb.org/cv/51/36751.jpg"
---

# Seichou Nikki ~Onii-chan to Yobasetai!~

![Seichou Nikki ~Onii-chan to Yobasetai!~](https://t.vndb.org/cv/51/36751.jpg)

**Alternative Title:** 性徴日記～お兄ちゃんと呼ばせたい！～

**Developer:** Euros

**Release date:** Oct 31, 2003

**Platform:** Windows

**Language:** Japanese

**Rating:** 9.0/10 (avg, 1 votes)

## Description
Main character needs to foster and grow customizable heroines throughout the year.

[From [vndbreview](https://vndbreview.blogspot.com/2019/06/vn-of-month-october-2003-lovers-koi-ni.html)]

## Characters
### Tooyama Takashi (遠山 隆)
- **Gender:** Male
- **Role:** Teacher

### Konno Mika (今野 実夏)
- **Gender:** Female
- **Hair:** Black, Waist Length+, Twin Braids
- **Clothes:** Sweater, Hair Ribbon, Cardigan, T-shirt, Sport Bloomers, Maid's Dress, Santa Suit, Old Type School Swimsuit, Pleated Skirt, Sundress
- **Eyes:** Blue
- **Body:** Small Breast Sizes
- **Voiced by:** Iwata Yuki

### Sasha (紗沙)
- **Gender:** Female
- **Hair:** Blue, Twin Tails, Waist Length+
- **Body:** Slim, Pale, Kemonomimi, Small Breast Sizes, Furry Tail
- **Eyes:** Blue
- **Clothes:** T-shirt, Sport Bloomers, Maid's Dress, Beret, Overall, Ribbon Hair Tie, Old Type School Swimsuit, Sundress, Sun Hat
- **Role:** Cat
- **Voiced by:** Kaneda Mahiru

### Tooyama Ruo (遠山 琉緒)
- **Gender:** Female
- **Hair:** Pink, Shoulder-length
- **Clothes:** Sweater, Headband, Jacket, Scarf, T-shirt, Miniskirt, Jeans, Shorts, Sport Bloomers, Thigh-high Stockings, Maid's Dress, Hoodie, Old Type School Swimsuit
- **Body:** Small Breast Sizes
- **Eyes:** Garnet
- **Voiced by:** Hokuto Minami

### Yoshizaki Amane (吉崎 雨音)
- **Gender:** Female
- **Eyes:** Black
- **Clothes:** Dress, Hair Ribbon, T-shirt, Sport Bloomers, Maid's Dress, Gothic, Old Type School Swimsuit
- **Hair:** Braid, Teal, Ankle Length
- **Body:** Small Breast Sizes
- **Voiced by:** Konoha Kaede

### Sasha's Mama (紗沙ママ)
- **Gender:** Female
- **Hair:** Blue, Waist Length+, Ringlet
- **Eyes:** Amber
- **Clothes:** Apron, Pleated Skirt
- **Role:** Mother, Cat
- **Body:** Kemonomimi, Furry Tail
- **Voiced by:** Hatono Hina

## Shops
- [Official Website](https://web.archive.org/web/20041209133004/http://www.euros.jp/sn/seityou_index.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=34043)

## Releases
### Japanese
- **2003-10-31**: Seichou Nikki ~Onii-chan to Yobasetai!~ First Press Limited Edition - [Official website](https://web.archive.org/web/20041209133004/http://www.euros.jp/sn/seityou_index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=3130), [Getchu](http://www.getchu.com/soft.phtml?id=34043)
- **2003-10-31**: Seichou Nikki ~Onii-chan to Yobasetai!~ Regular Edition - [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=3130)

## Tags
Sexual Content, ADV, Male Protagonist, Loli Heroine, Catgirl Heroine, Customization, Alien Heroine, Twin Tail Heroine, Raising Simulation

## More Games from Euros
- [Seichou Nikki ~Onii-chan to Yobasetai!~](https://pinovel.net/v7171)
- [Chijoku no Gakuen ~Toukou Sareru Onna Kyoushi~](https://pinovel.net/v9686)

---
*View the full details at [pinovel.net/v7171](https://pinovel.net/v7171).*

```json
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```