Sasaki-kun, a slightly crazy boy, is in love with his Siina-senpai, a bad boy who 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.

元気いっぱいの金髪ヤンキー佐々木は、学校イチのモテ男、椎名先輩に一目惚れ。
想いを抑えきれなくなった佐々木は椎名先輩に告白！　
「男に興味ない」と振られても、めげずに告白を続ける毎日。
159回目の告白で先輩からあることを言われた佐々木は……!?