Make Your Tsundere Little Sister Fall for You!! ~30 Days Living Together~

You are the older brother of a younger sister who is just starting to learn about sex, and you can develop her body over the course of 30 days. Increase your sister’s favorability by going out with her, and increase her lewdness through late-night touching to make her fall in love with you! The ending changes depending on your status and progress.

Synopsis Due to his parents’ sudden trip abroad, the protagonist has to live alone with his rebellious younger sister for a month. One night, he peeks into his sister’s room and finds her struggling to masturbate for the first time. As her older brother, he decides to develop his sister’s body in the middle of the night in order to release her sexual desire. The naughty 30 days with his sister begins!

Special Features
You can increase her favorability by making good use of the options that change between day and night.
Earn some money through part-time work and use it to try to get closer to your sister.

Character Introduction
Your Younger Sister (default name: Saki)
A student who recently began her rebellious phase against her older brother.
Despite her outstanding figure that is obvious at a glance, she has no sexual experience and had never masturbated.
Although she generally takes an assertive attitude towards her older brother, the protagonist, she also has an obedient, more honest side.
As long as her brother invites her out, she will go with him.
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Original Title: ツンな妹をデレ堕とす！！ ～二人で暮らす30日間～
Aliases: From Tsun to Dere Conquering Your Sister’s Heart!
Developer: Studio Neko Kick / スタジオねこキック DLsite – Website – Pixiv
Translator: SuTODx Patreon
Censored: Yes (Mosaics)
Store: DLsite
Language: English (Fan Translation)
Voices: Japanese