Chihaya Muramoto

Is a vocalist of a band called ex-t. He first appeared by bumping into Himeno while running away from magazine journalists. He treats her wound and walks away but is strongly attracted to Himeno and tries to kiss her due to her "beating heart". But the reason why her heart is beating so fast is because Chihaya looks like Keigo. Eventually he runs away after being confronted by Keigo and Mamoru.