There's only one member and I'm the only advisor. After school, the two of them seduce students and have sex repeatedly. (Mariko Sada, JUQ-330)

Mariko, who was at odds with the school over bullying, decided to be transferred to a distant location. She became the art club advisor, with Kuroi as the only other member of the new school. One day, as she was heading to the clubroom, she witnessed Kuroi being bullied—despite Mariko's reprimand, the situation remained unchanged, leaving her feeling powerless and frustrated. Kuroi told her, "...I'm already happy as long as you can protect me." Filled with a mixture of frustration and affection, Mariko crossed the line with Kuroi in the clubroom after school.