I've actually never seen a whole episode of Matthew's Best Hit. I've only seen clips of it when he tried to CLOMP Tsubasa. And has seen one where they were doing a fortune telling of Aiba Masaki.

Well I know that Koichi acts really dumb and baka on Shin Domoto Kyodai ~ But I think one part of it is he's acting but I know apparently Koichi is really "Tenin Boke”

Than again many people act all dumb and food cause it makes the fans happy to see their fav idol's acting all silly and stuff right. FAN SA-BISU. LOL