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Oh, Oniichan! cover
Ongoing v1

Oh, Oniichan!

RATING 2.3 /5 3 votes
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POPULARITY #11,218
Unity 4,045 224.99 MB
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Developer Tiny Secret Games
Engine Unity
Version 1 (Ongoing)
Released: Mar 30, 2025 Updated: Apr 19, 2025
Censorship Uncensored

About Oh, Oniichan!

Your sis turned 18 and wants to start her own OnlyWaifus page. Will you support her?
Enjoy chatting with Sera-chan in this hentai chat game. As the story progresses, you can unlock various pictures of her and develop the relationship from innocent photo sharing up to so much more.
Realistic Phone-Chat
Chat with your sis about her dreams and sexual preferences in a realistic Phone-Chat simulation. Chat sessions are scheduled in real time for more immersion. You will play this game in short sessions to experience the story over the course of an entire week.
Chose Her Name
You can decide how she is called and how she will address you! By default, her name is Sera-chan and she will call you Oniichan.​

Downloads

v1
v1 224.99 MB Apr 19, 2025

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  • Extract and run.
1 Apr 19, 2025

initial release

Minimum

OS: Windows 7+ / macOS 10.13+

CPU: Dual Core 2.0 GHz

RAM: 4 GB

GPU: Integrated (DX10)

Storage: 224.99 MB

Recommended

OS: Windows 10+ / macOS 12+

CPU: Quad Core 2.5 GHz

RAM: 8 GB

GPU: GTX 750 / RX 460

Storage: 224.99 MB

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