On the first day of the new school term, Akihito Abikura 's homeroom teacher, Hiyori
Hiwamura , appears covered in blood in his classroom . Her suspicious behavior quickly leads to rumors that she's a "scary teacher" who will curse anyone who displeases her ... But after school, Abikura witnesses a shocking truth. The teacher, practicing her lesson in the empty classroom, is actually a "weak teacher" with a quiet voice and zero stamina!

Abikura helps Ms. Hiwamura find some documents at her new home after she's moved . However , he discovers some sexy underwear that's practically just a string ...! Meanwhile, Ms. Hiwamura thinks Abikura might be able to open up Yukishita Yuuki , a student who's been skipping school, so she takes him to Yukishita's house. But Yukishita greets her by groping her breasts, and Abikura's anger is about to explode...