A diligent student named Ikeda, who aspires to become a doctor, has been studying hard. However, recently he has been distracted by Kotomi, making it difficult for him to focus on his studies. During class, he would secretly film Kotomi and then masturbate in the gym storage room during breaks. One day, sensing someone's presence, Ikeda quickly hides. Unaware of Ikeda, Kotomi starts making a phone call. By chance, Ikeda overhears Kotomi's conversation with her boyfriend...