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"!
And you know what'll happen 
if you don't do it, right?
Sabes lo que pasará si 
no lo haces, ¿verdad?
Sabes lo que pasará si 
no lo haces, ¿verdad?
E você sabe o que acontece
 se não conseguir, não é?