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.
Download
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.
Tags for themes in Oh, Oniichan!!:
Chatting
CS/Sexting
Teen (18 years old)
OnlyFans (OnlyWaifus 😉)
Sis/Oniichan
Nudes
Masturbation
Sauna
Bath and Shower
Lesbian
Virginity/First Time
Blowjob/Oral Sex
Vaginal Sex
Anal Sex
