It was just one mistake... Akari, a teacher at a girls' school, steals an SM magazine out of curiosity, perhaps due to the stress of everyday life. Rika, taking advantage of Akari's weakness, presses her and reveals her sadistic feelings.... Prostration, slapping, hemp rope bondage, strap-on irama, spanking, anal training, and turning her into a bitch slave! The teacher's pride crumbles under the harsh training and she awakens to the pleasure of masochism! Devil female student x female teacher hard lesbian!