Synopsis: Sensei! Bokutachi ga Sekai wo Horoboshimasu.

A "Teacher" holds a revered role in safeguarding and guiding students. In a world where magic users and non-magic users coexist, Solo is a sorcerer who lives in solitude. He is also recognized as No. 0, a proficient assassin who successfully fulfills every request he receives. "As part of a specific mission, I am tasked with teaching at a magic school, and the students I am assigned to are from Class 2D, which consists of dropouts." As he fervently assumes the responsibilities of a teacher to accomplish his mission, a transfer student appears, and the circumstances take an unforeseen twist... A school fantasy unfolds involving a pretender teacher, the mightiest assassin, and the most wicked students who act as his "beacon"!