The Letter in the Desk: When I Accused the Delinquent, He Turned Bright Red

Kurosaki Riku is a lone-wolf delinquent feared around the school. After class, a letter found in the desk reveals clumsy, straightforward feelings. Convinced by the handwriting and folding style that it's from him, I confront him—and the usual intimidation vanishes as he turns red to the ears and starts floundering...?