Mairimashita! Iruma-Kun is a Manga/Manhwa/Manhua in english language, Comedy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Mairimashita! Iruma-kun is the story of Suzuki Iruma, who has been sold to the demon by his irresponsible parents in exchange for money. Surprisingly, next thing he knows, he is living with the demon and has been transferred into a school from Demon World. We invite you to follow Iruma-kun's extraordinary school life.