Yuka's love for reading led her to develop an interest in literature, and she aimed to become a researcher at the national faculty of literature. However, she is now married to a husband she met while in school and leads a mundane life as a full-time housewife. Her demanding only son is growing up steadily, and Yuka has too much free time on her hands. It was around this time that her son decided to have a friend over for an overnight study session. Yuka also participated in the study session as the teacher... but as she looked into her son's friend's pure eyes, Yuka's abnormal sadistic love awoke...
