Mitsuki and Kazuki are a naive couple who have not even kissed yet. However, one day Kazuki reunites with a delinquent who used to bully him. Mitsuki happens to witness Kazuki being threatened and extorted for money as before and protests to the delinquent. The delinquent has his eye on Mitsuki and threatens Kazuki to send him nude photos of Mitsuki, which he then uses to try to destroy Mitsuki's trust in Kazuki. However, Mitsuki remains unfazed, so the delinquent gets angry and forces him to take an aphrodisiac...