Kusuo Suzuki's Newest Adventure[ Welcome to demon school Iruma-kun! x Saiki K! ]

Kusuo Suzuki, formerly known as Kusuo Saiki.

Adopted by the Suzuki family. Iruma found him in the woods when he was a kid, and brought him home because he felt guilty leaving him there of course, since he himself apparently didn't know where he was or where he lived.

And so, because of their parents greediness, the two were sold to a demon.