Keiko Asahina is a female teacher who rules Bunsei Academy using her own body. When she passes by the teaching office in the late afternoon after enjoying sex with her school servants as usual, she hears angry voices coming from inside. When she peeked inside, she found that the staff member in charge of teaching affairs, "Servant No. 1," was being severely berated by a man and woman who appeared to be monster parents. When asked what was going on, they told her that a student, Kohei Torii, had shoplifted at a bookstore and his parents were claiming that it was due to poor education at the school. His parents are "Torii Sanzo," who runs a pachinko parlor in front of the station, and his wife "Torii Mitsuko. However, when he saw Keiko, who had been begged by his servant No. 1 to take over the situation, Sanzo's attitude changed drastically. "Let's have a long talk at my house, okay?" Sanzo's purpose was clear as he walked away with a foul-smelling breath in his mouth. She said to servant No. 1, who was worried about Keiko's safety, "That's fine, that's what I want. I'll squeeze it out of you. If you don't take them out once and for all, they'll continue to grow, won't they? Well, watch, I'll avenge you, too! [Translated from official site]