Serious Ms. Anna was strict in guiding even delinquent students. However, she ended up being resented by the delinquents… Unaware of this, while riding a train, Ms. Anna was assaulted by a molester and couldn't scream, left to do as he pleased… But that was only the prologue to tragedy. A delinquent boy who happened to be on the same train filmed the entire ordeal out of long-held grudges. From the next day onward, they blackmailed her with this footage, turning her into a toy for the students！！
