A "Teacher" has a sacred job that protects and guides students.
In this world where people who can use magic and people who cannot use magic coexist, Solo is a sorcerer who lives alone.
He is also known as No. 0, a skilled assassin who always completes any request he receives.
"As part of a certain mission, I am assigned to teach at a magic school, and the teenagers I am assigned to teach are the students of the Class 2D, which is made up of dropouts."
While he is desperately playing the role of a teacher in order to complete his mission, a transfer student arrives and the situation takes an unexpected turn...
A school fantasy unfolding between a false teacher and the strongest assassin and the most evil students who serve as his "beacon"!
