Oh, Oniichan!

A phone-based hentai chat game where you interact with Sera-chan, your adult sister, as she launches her OnlyWaifus page. Through realistic text conversations scheduled in real time over the course of a week, you discuss her dreams and preferences while gradually unlocking intimate photos and developing your relationship. Customize both her name and how she addresses you, and progress through increasingly explicit scenarios from photo sharing to sexual content.