Tachibana is known as the PTA president, an absolute authority at a certain school. However, he is strict with the school's teachers, and his unreasonableness towards Mr. Tanaka is particularly glaring. Tanaka, who is a low-life scumbag with a strong sense of self-esteem, gets hold of a hypnotizing smartphone from somewhere. However, he is skeptical. The next day, Tachibana comes to pick a fight in broad daylight. It seems he has come to find fault with his son's smartphone. It looks like a familiar smartphone. Tanaka takes advantage of this opportunity and successfully hypnotizes Tachibana in the staff room. He gets his way more and more and gradually gets a taste for it... Tanaka's desire for control and Kokoro for revenge grow...