My Younger Sister is My Roommate!
by OMNC
About My Younger Sister is My Roommate!
My Younger Sister is My Roommate! is an adult 2D animated CG game by OMNC, made with Unity. You play as an older brother when Yui, his younger sister, moves into his home after her dorm plumbing fails. She stays until the repairs end, and their years apart make the situation awkward: she is cold yet unusually unreserved around him. The game plays as a dating sim focused on romance and management.
The current build is version v1.0, released October 26, 2026, and development is finished. It runs on Windows and supports English, Japanese, and Simplified Chinese. Adult content is censored with mosaic.
Developer's description
After a water pipe broke at her dormitory, Yui came to stay at my place until the repairs were finished. It’s been years since I last saw my younger sister, and she’s quite cold—not to mention completely unreserved with me, her older brother.
My Younger Sister is My Roommate! screenshots
Download My Younger Sister is My Roommate! v1.0
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