Oh, Oniichan! (Hentai Chat Game)

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.

About the Developer

This is a hentai-spinoff of  It started as an April fool's project and became a full game. The two games are similar in their story, with the biggest difference being the artstyle. I recommend playing either one of the two depending on what style you prefer.

Want to see more content added? Then please rate the game and let me know that you liked it!

Check out my  if you want to support my work and unlock cheats for the game.

New 3D Open-World Hentai RPG Snapshot! out now:

Tags for themes in Oh, Oniichan!!:

ChattingCS/SextingTeen (18 years old)OnlyFans (OnlyWaifus 😉)Sis/OniichanNudesMasturbationSaunaBath and ShowerLesbianVirginity/First TimeBlowjob/Oral SexVaginal Sex Anal Sex

Disclaimer:

All characters depicted are 18 years of age or older. AI was used for the creation of some images. This game contains mature themes, including sexual content, and is not suitable for all audiences. Viewer discretion is advised.

"Oh, Oniichan! (Hentai Chat Game)" by Tiny Secret Games is available for you by our large adult game library and is available for free to download right now. The total size of the game is 0 MB. You can support the developer of the game - Tiny Secret Games on patreon. Try playing other adult and anime free games to find your favourite. Check out the screenshots of this before downloading it to get familiar with the style, genre and gameplay. Leave your opinion to allow others to discover it. You can find more games using search and tags.