A stern face as a teacher. A lewd woman's face in relationships with students. Rika Ko used both faces to lead a fulfilling life in her work and private life. However, the other party was a hot-blooded youth. Rika Ko's trysts gradually escalated, eventually leading to them seeking each other out within the school. In the health room. In the hallway. Repeated dangerous intercourse in situations where other students were right there. But Rika Ko also became addicted to the thrill and couldn't stop the student.
