a masochistic tendency had sprouted. "I wish after school would come sooner... I want to be trained more intensely..." The beautiful girl shuuka, who was living a ordinary student life, one day saw a nude cheki of a girl stuck on the blackboard and was drawn to its lewd appearance. In the midst of this, she hears a rumor from a classmate. A club that ties up and trains female students to make them happy... "After School Training Club" — It is said that there is such a secret club in this school. Shuuka, who has stepped into the world of bondage and training for the first time, volunteers to join...
