GAJK-029 A schoolgirl is tied up and trained in the storehouse. Her stepfather disciplines his daughter, who has a cosplay hobby and is naive about the world, with insidious and obscene rope training every day... Miku Arima

Since her mother passed away, Miku has lived a modest life with her stepfather. One day, she gets into an argument with her stepfather over her future. Miku dreams of going to Tokyo and becoming a cosplay idol, but her stepfather tells her to stop dreaming and that the outside world is tough. The argument goes nowhere, and Miku finally decides to run away from home. Her stepfather, unable to bear seeing her, tells her to come over and drags her into the storehouse. "I've got a lot to tell you..."