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

Make Your Tsundere Little Sister Fall for You!! 30 Days Living Together is a 2D dating sim for players who want a close, taboo-flavored household romance. The tone stays intimate and playful, focused on one household and one relationship.

Story

With their parents away on a sudden trip abroad, the protagonist ends up living alone with his rebellious younger sister for a month. When he catches her one night trying to masturbate for the first time, he decides to guide her sexual awakening himself, setting off thirty days of shared life under one roof.

Gameplay

Over the 30-day span, the player splits time between daytime outings with his sister, which raise her favorability, and nighttime touching sessions that build her arousal and comfort with him. Both stats track together, shaping how she responds and which ending the player reaches at the end of the month. Choices in how to spend each day and night steer her from guarded to willing over the course of the game.

Features

• Full 30-day calendar structure tying daily activities to a single evolving relationship
• Multiple endings determined by the balance of favorability and lewdness reached by day 30
• Voiced scenes and 2D character art supporting the day-by-day progression