Oh, Oniichan!
Game Description:
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.
- Extract and run.
initial release
- Dual Core Pentium or equivalent Processor.
- Intel HD 2000 or equivalent Graphics.
- 224.99 MB of free disk space (Recommended to have twice as much free disk space than this).
Oh, Oniichan! - Ongoing - v.1 Links And Mirrors
About The Game: Oh, Oniichan! is a porn game made on Unity game engine. This game is rated M and meant for adults with explicit contents and strong language. It is advised to read the tags to get an idea about the game. The current available version is v.Oh, Oniichan!. THe contents of the game is Uncensored. Oh, Oniichan! is developed and distributed by Tiny Secret Games, Please support Tiny Secret Games if want the development of Oh, Oniichan! game going or want to see more new games from them in future. The download links are crawled and gathered from various public sites. We do not host/modify or alter the contents. The uploader is responsible for the DMCA.
Oh, Oniichan!'s latest build v.1 is available in Windows platforms and currently Ongoing. We last updated this game in April 19, 2025.
Oh, Oniichan!'s latest build v.1 is available in Windows platforms and currently Ongoing. We last updated this game in April 19, 2025.
