Mission! School

Isicawa Takuya, a high school student who does not stand out in any particular way, is surprised when his director asks him to take responsibility for some translated students. She is even more surprised, finding that in fact 30 charming disciples were transferred to her care, which came from boarding school, which was destroyed as a result of a fire! At first it seems to be a dream, but then he notices his knives ... and pistols ... what school came from which school?