Shiori, who had no friends at school and was treated like air, eventually became a shut-in and stopped attending school. One day, she was attacked by her homeroom teacher during a home visit and subjected to intense deepthroat instruction. Her flustered, inexperienced, and resistant throat-virgin reactions are realistic, stirring the sadistic side of men. The next day, Shiori goes to school for the first time in six months, but on the way, she's pulled by the teacher into a secluded spot. There, throat-deep instruction is given again, and she's forced to wear a ball gag dildo under her mask, enduring a deepthroat mask assault. After school, she's called out by classmates who say, "We'll be your friends and play with you," and she's subjected to a gangbang deepthroat. Then, she gets belly punches, kicks, slaps, water torture, and is exposed without makeup, all as part of "playing nicely" (?) with them. A series of brutal, gut-wrenching plays unfold—acts that should be painful and miserable—but Shiori, who had been lonely until now, brain-converts this into "they finally faced me" and develops a delusion of love. Combined with her masochistic tendencies, Shiori gradually awakens as a masochist. She feels, "This crazy world is my place to be..."