"How is it? Sweet, right?" Hinano, a library committee member, discovers Haruna-kun, who's famous for being super popular, sleeping in the library. Moreover, Hinano gets entangled with Haruna-kun and is robbed of her first kiss ...! She goes home trying to forget about it, but what is Haruna-kun doing at her house? Her mom suddenly drops a bomb that they will be living together for half a year?! A heart-pounding cohabitation love story with the sweet, free-spirited Haruna-kun~