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"!
Yeah, see... It got out that 
Itou-sensei wears a hairpiece.
Sí, verás... se descubrió 
que Itou-sensei usa peluca.
Sí, verás... se descubrió 
que Itou-sensei usa peluca.
Isso. Sabe, descobriram que
 o professor Itou usa peruca.