Sasaki-kun, a slightly crazy boy, is in love with his senpai, a bad boy, and he likes that even more! Siina-senpai changes girlfriends more than pants and Sasaki-kun has a record of more than 160 confessions to his senpai. While Siina-Senpai devises ways to make Sasaki give up, Sasaki is in love with this bad boy and won't give up until he wins him.