Teppei just transferred into Kaimei Academy, and he's pressured to join the Sket-dan by his classmate, Bossun. Then, one day, Teppei is attacked by a mysterious masked paint chucker, "Paint Mask"!
What? Don't be so picky!
¿Qué pasa? ¡No se rían!
¿Qué pasa? ¡No seáis tan exigentes!
O quê? Não seja tão exigente!