Fourteen-year-old Suzuki Iruma has just been abandoned and sold to a demon by his irresponsible parents! Surprisingly,
the next thing he knows he’s living with the demon who has adopted him as his new grandson,
and has been transferred into a school in the demon world where his new “demon” grandfather works as the principal.
Thus begins the cowardly Iruma-Kun’s extraordinary school life among the otherworldly as he faces his true self,
takes on challenges, and rises to become someone great.