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!! This is the long-awaited first volume of an intimate love story, featuring a sweet and playful sempai!