Misuzu was ecstatic to secure her desired position as a teacher at a highly esteemed high school. Her excitement knew no bounds, and she was content with her committed relationship with the principal, Kazuki, which was flourishing well. However, events take an unforeseen twist when Masahiro, Kazuki's younger brother and fellow student at the school, manipulates Misuzu into engaging in sexual activities with him. Despite her initial resistance, Misuzu eventually develops romantic feelings for Masahiro. The liaison between teacher and student is shrouded in secrecy and must remain anonymous.