An Anzu Mitsuki, a teacher at a girls' school and Mikuru's homeroom teacher, is a genuine lesbian who likes young girls and chose to KO girls. Born into a wealthy family, she lived a life of luxury and had to do whatever her parents told her to do, but she was fed up with this. She went to pick up her student, Mikuru, who was taken into custody for shoplifting underwear on a whim, and when she heard the situation, it seemed quite complicated. Mizuki listened to her and gave her advice, but in fact there was a purpose behind listening to her so sympathetically...