One day, when a deliveryman went to deliver a package to a valued client's house, he was greeted by a married woman in provocative attire. Every time he goes there, the wife tempts him with her lascivious looks...

Volume 1: When an introverted run-of-the-mill girl who has never fallen in love or had sex is called to the gymnasium storage room by someone she likes...Awaiting for her there was a group of sadistic good...

A twisted love triangle where two brothers fight over their childhood friend, the female protagonist. Even after the female protagonist relationship with Yuuki is found out, she continues her intimacy with Aki...