Hakoiri Yankee no Hon

Reika Akutsu, the daughter of the chancellor, does whatever she wants at school. She met up with her old childhood friend XX, but XX has forgotten all about Reika. Reika gets angry and uses his weakness as an excuse to bully him. But then he finds out her weakness and she's the one who's going to get fucked!
(Source: DLsite, translated)
Note: Published in Comic Market 96