Welcome to Demon School! Iruma-kun

Kalego is forced to go visit all of the homes of the Misfit Class due to Sullivan's orders. He wants to get this over with as soon as possible but considering how unique all of his students and their families are, he has trouble finishing this quickly. He finally gets to Iruma's home, which is Sullivan's mansion, and he seems to be on guard. It appears that there's somewhere here who he's known since high school, and...