"I know it's wrong, but... my anus is throbbing and I can't stop!" My student, Mizuki, and I, her homeroom teacher, are secretly in a "S-M" relationship. My adorable girlfriend plays with me like a little devil, hiding from the eyes of the other students in the class. After school, we spend the day at a love hotel, drowning in the pleasures of our "reverse" relationship... She uses her slender fingers to wildly stir up the inside of my anus, toying with me and violating me! My student, who is tossing me around with her devilish temptation, corners me...