Concerned about her son's poor grades, Chisato consulted her homeroom teacher, but the teacher's reaction to her son's poor performance was not good. Chisato gets worried about her and enlists her teacher to help her improve her grades. However, as a result, she became addicted to the charm of her pleasure attacking a man. After that, Chisato pretended to think about her son, and she poisoned the men involved in her son one after another.
