High schooler Matsuri has an unexpected encounter with her brother’s friend, Asahi-sempai, who also happens to be a popular boy at her school. From then on, Asahi-sempai makes passes at her at school or even at her own house! Wherever Matsuri might be, there’s just no escaping him… Every day with the somewhat perverse Asahi-sempai is an unbelievably stimulating experience for Matsuri, and she can’t help but be flustered!!
Matsuri wanted to be Asahi-sempai's girlfriend, but with Asahi-sempai not wanting her to get hurt and their feelings in conflict with each other, their relationship came to an end ... But just as Matsuri is getting over the breakup, her cousin Haruto confesses his love to her! Bewildered by this sudden turn of events, Matsuri goes along with Haruto when he asks her to go with him to the shopping mall ... only to run into none other than Asahi-sempai!