Kyouhei Doujima 堂島凶平

He is one of Riku's classmates which he looks like a tough, muscle-bound bouncer. He swore himself to protect Sayuri from other boys until he meets Riku. He gets constantly beaten up badly by Mr. Chick when Doujima confronts Riku. After being beaten the first time by Mr. Chick, Doujima is convinced that Riku is worthy enough to protect Sayuri that he insists Riku to be with Sayuri. He is now hanging around with Riku and his friends.