>>280803911
I remember reading a hentai manga about a girl who often verbally abused the boys around her until they eventually got fed up with her and gangraped her. While doing so, she realizes that they were the closest thing to friends that she had and started softening up to them and letting them gangbang her out of remorse. Then, when her mother finds out what she's been doing and disown her, the boys come to her defense and hatch a plan to get back at her mother by blackmailing her into being their sex slave. It ends with both the girl and the mother happily pregnant with the boys' children.