This is the first time Fua has visited a student's house since becoming a teacher. Upon arrival, Fua was overwhelmed by the smell of garbage mixed with sweat. After knocking on the door, she was invited inside by Yuta's father. Despite his claim of having cleaned up, the room was still extremely messy, with trash everywhere. While discussing Yuta's situation, he approached Fua and sexually assaulted her. Despite her efforts to resist, Fua's strength was no match for a middle-aged man. After that incident, Fua swore she would never come back to this place again! But recently, it seems Yuta has been bullied. With no other choice, Fua had to go to the place she least wanted to go to exchange information about the student's situation. This time, she was drugged by him in the water. Fua's body became extremely sensitive and she was sexually assaulted again. Not only that, she discovered that Yuta was not being bullied at all; he and his father had planned to trap her. And then, Fua was repeatedly defiled by the student and his father in the filthy room...