Tramp Stamp: Anime edition

Tramp Stamp: Anime edition (2017) is a animation with 1 season, rated 5.0/10.

It starts out as simple curiosity. She has a mediocre first experience with a classmate, her teacher awakens her to her desires, and eventually she "keeps" a rapist to satisfy her carnal desires. She is past the point of no return, and that's completely fine with her.