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