SDDE-568 — Dear High School Student Me. Mayu, The Art Club Member You've Always Liked And Dated, Was Having Sex With All The Boys In The Class. Azumi Hina

In the winter of his fourth year of college, his classmates reunite for the first time in five years at a class reunion. The protagonist, Takao, has not yet received a job offer and attends the reunion with mixed feelings. Mayu, his girlfriend at the time, is also there. There, Takao learns a shocking truth. To his surprise, Mayu has been having sex with almost all the boys in her class. Another side of her that I don't know.