Female teacher Kimishima Mio one day witnesses a colleague being stripped naked and tied up by students in the school. With her strong sense of justice, Mio agrees to take her place and performs public masturbation naked in front of the students. The next day after school, she goes along with an apostle's invitation to a hotel and is drugged and raped. However, the students' desires do not subside, escalating to her being tied up and orgasming in the classroom. Despite this, Mio tries to continue teaching seriously, but the students surround her and rape her repeatedly!
