The first installment of a new series stars popular milf actress Marina Matsumoto in a passionate performance as an ambitious and lustful female principal. After being subjected to shocking forced sex by the chairman's son, she witnesses the illicit affair between the school chairman and the head teacher. Traumatized by the incident, she turns to masturbation, eventually ending up having creampie sex with the chairman himself. The film culminates in her captivating expression, marked by a mysterious smile. Supporting actress Yumiko Hayama also draws attention with her erotic performance.