Mitsuki and Kazuki are still innocent couple who haven't even kissed yet. However, Kazuki one day reunites with a delinquent who used to bully him. Seeing Kazuki being threatened and having money extorted from him, Mitsuki protests against the delinquent. The delinquent, who has his eyes on Mitsuki, threatens Kazuki to send him Mitsuki's nude photos and tries to break Mitsuki's trust in Kazuki. But Mitsuki remains unfazed, so the delinquent forcefully administers aphrodisiac to her.