An ordinary high school girl, Toyomori Miku, is anxious about her first time having sex, so she refuses to kiss her boyfriend, Tsuneda Ryo. The next day after school, the badminton club coach, Chikura, who senses Miku's worries, touches her body under the pretext of ''getting used to men'' and they end up having sex... Miku has no way to resist her first time having sex... her coach's skilled techniques and their physical compatibility... (͠≖ ͜ʖ͠≖)