I had a childhood friend named Hiyori that I hated. - One day when I returned to my parents' house for the first time in 10 years after failing to get into university or finding a job, I happened to run into that troublesome Hiyori again... - Hiyori, who was now a CA, was beautiful and truly the flower of Takamine. - And before I knew it, I became addicted to Hiyori and couldn't live without her...even though I should have hated her... - An ejaculation management training drama in which a child's childhood friend, a virgin, becomes his own obedient pet.