Yuuki, a reserved boy, couldn't bring himself to invite his childhood friend Aika, whom he secretly had feelings for, to hang out over the summer. The once lively Aika had suddenly gotten into reading and calmed down, making it harder to approach her... As Yuuki headed home, still lamenting over this fact, the sinister hand of an older man with the twisted belief that "after years of indulging in various fetishes, the most exciting thing is the sex between innocent young couples" crept closer...!!