---
title: "Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~"
description: "This spring, at the local prep school Seiyou Academy, where the protagonist (nameable) attends. He has something that he cannot share with anyone, a secret.  \"T"
image: "https://t.vndb.org/cv/10/70810.jpg"
---

# Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~

![Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~](https://t.vndb.org/cv/10/70810.jpg)

**Alternative Title:** 幸乃下蛍の恋青日和 ～お義姉ちゃんとの秘密同棲～

**Developer:** TOKOHANA

**Release date:** Nov 24, 2023

**Platform:** Windows

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

**Rating:** 6.5/10 (20 votes)

## Description
This spring, at the local prep school Seiyou Academy, where the protagonist (nameable) attends. He has something that he cannot share with anyone, a secret.

"Today is a good day for the entrance ceremony, to all new students. Congratulations on your admissions."
"On behalf of the current students, I sincerely welcome you."

Smiling on the podium, the student council president Yukinoshita Hotaru, due to the recent remarriage of their parents, she has become the protagonist's step-sister.

A person he admires, since he has feelings for her, he keeps his distance. Because his sister thinks that he is adorable and likes him, she is unable to get closer to him.

The turning point of their relationship comes, when suddenly, their parents decide to go on a trip. Naturally, the protagonist and his sister are left to take care of the house. Whether they like it or not, their feelings risen.

A secret cohabitation life, now, it begins!

[Translated and edited from the [official website](http://www.willplus-japan.com/tokohana/product/koharubiyori/#story)]

## Characters
### Yukinoshita Hotaru (幸乃下 蛍)
- **Gender:** Female
- **Measurements:** Height: 151cm, Bust-Waist-Hips: 88-51-92cm
- **Hair:** Waist Length+
- **Body:** Teen, Slim, Pale, Big Breasts
- **Role:** Student Council President, Non-blood-related Sister, Title Character
- **Clothes:** Sailor School Uniform
- **Voiced by:** Aimai Moko

## Shops
- [Official Website](http://www.willplus-japan.com/tokohana/product/koharubiyori/special_goukaban.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1251680)

## Releases
### Japanese
- **2023-10-05**: Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~ Trial Version - [Official website](http://www.willplus-japan.com/tokohana/product/koharubiyori/special_trial.html)
- **2023-11-24**: Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~ - [Official website](http://www.willplus-japan.com/tokohana/product/koharubiyori/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35072), [Getchu](http://www.getchu.com/soft.phtml?id=1251679), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=2181will464/)
- **2023-11-24**: Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~ w/ Dakimakura - [Official website](http://www.willplus-japan.com/tokohana/product/koharubiyori/special_dakimakura.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35072), [Getchu](http://www.getchu.com/soft.phtml?id=1251680), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=2181will464set/)
- **2023-11-27**: Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~ Deluxe Edition - [Official website](http://www.willplus-japan.com/tokohana/product/koharubiyori/special_goukaban.html)

### Chinese (simplified)
- **TBA**: Yukinoshita Hotaru De Mulian Chuqing - He Yijie De Mimi Tongju Shenghuo - [Official website](https://tieba.baidu.com/p/8628528836)

## Tags
ADV, Non-blood-related Brother/Sister Incest, Male Protagonist, Nameable Protagonist, Protagonist's Non-blood-related Sister as a Heroine, Only a Single Heroine, Defloration, Only Virgin Heroines, Spring, Student Council President Heroine, Only Protagonist's Sisters as Heroine(s), Protagonist's Older Sister as a Heroine, High School Student Heroine, Sex with Protagonist Only, Heroine with Big Breasts

## More Games from TOKOHANA
- [Kanojo to Ore no Koisome Dousei](https://pinovel.net/v22705)
- [Boku to Kanojo no Gohoushi Dousei](https://pinovel.net/v23392)
- [Toshiue Kanojo no Amayaka Dousei](https://pinovel.net/v24852)
- [Oshikake Kanojo wa, Ore no Sewa o Shitai](https://pinovel.net/v26515)
- [Healing Days ~Toshi no Sa Kanojo to no Ama Ama Seikatsu~](https://pinovel.net/v28511)
- [Koi Suru Amairo Homestay -Ryuugakusei wa Wanko-kei Osananajimi](https://pinovel.net/v35283)
- [Namaiki Yume-chan wa Onii to Mechakucha H Shitai!](https://pinovel.net/v41946)
- [Yume-chan no Dokidoki Shinkon Seikatsu: Yokou Enshuuchuu!](https://pinovel.net/v42089)
- [Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~](https://pinovel.net/v47136)
- [Koakuma Nurse no Itazura Karte ~Kangoshi Kanojo to no Dousei Seikatsu~](https://pinovel.net/v49951)
- [Ero Manga Onee-chan!! ~Damedame na Ane to no Amaama Cosplay Ecchi na Hibi~](https://pinovel.net/v53124)
- [OfficeLove -Cool na Senpai-Kanojo to Himitsu no "Iki-nuki"-](https://pinovel.net/v61221)

---
*View the full details at [pinovel.net/v47136](https://pinovel.net/v47136).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v47136#game","name":"Yukinoshita Hotaru no Koharubiyori ~Onee-chan to no Himitsu Dousei~","description":"This spring, at the local prep school Seiyou Academy, where the protagonist (nameable) attends. He has something that he cannot share with anyone, a secret.  \"T","url":"https://pinovel.net/v47136","image":"https://t.vndb.org/cv/10/70810.jpg","author":{"@type":"Organization","name":"TOKOHANA"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"6.5","bestRating":10,"worstRating":1,"ratingCount":20}}
```