Kisaragi Masaru was born female but raised as a boy due to her father's strict upbringing. Living as the male student council president, she successfully concealed her true gender from everyone around her. However, after an incident exposes her secret to certain students and teachers, she is forced into sexual acts as hush money. In these situations, her deeply buried lustful nature and masochistic tendencies begin to surface. The story reveals the conflict between her desperate efforts to maintain her male identity and the hidden desires she can no longer suppress.