A super cute female student who is something of an idol at school, but has such a strong sense of justice that she tries to help her homeroom teacher who is being treated badly by bad students, which earns her the resentment of the students and leads to her being locked up in the school storeroom together with her homeroom teacher. "Have sex with your precious student and get the footage on camera as evidence! Then I'll let you out of there. But I won't let you out until then." And so begins the dangerous life of confinement between teacher and female student...