It's Only Witches' Temptation

Shiraishi Akito, who lost his parents when he was young, is now looking for a job after graduating from high school. Akito is having a hard time with his successive failures, but he is finally hired as a janitor at a certain school. However, it turned out to be a witch school in another world! Furthermore, he was given a shocking secret mission to do something to a girl...!?