After enduring a month of being her ex boyfriend's fuckbuddy, Aoi thought she would finally be free to return to her normal, peaceful school life with her new boyfriend. Despite knowing who she was dealing with, however, she is shocked to learn that Kazuki's older brother had secretly filmed them fucking, in his bed no less! Desperate to keep it a secret, Aoi agrees to be her ex's sex slave for the whole of the summer break in exchange for getting rid of the footage. With Kazuki still none the wiser, will Aoi be able to keep things hidden long enough to return to her normal life?
Kazuki's finally managed to start dating his crush, a cute girl in his class named Aoi. It's a dream come true! What he doesn't know is that when Aoi was younger, she was seduced by Kazuki's older brother, who took her virginity. Once Kazuki's brother realizes what's going on, it doesn't take him long to exploit his lucky break. He kept some sexy pictures from the tryst years ago to blackmail Aoi with, and eagerly starts to cuckold his unfortunate younger brother.