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"!
Where are you watching from, Jougasaki?
Jougasaki, ¿desde dónde nos estás mirando?
Jougasaki, ¿desde dónde nos estás mirando?
Da onde você está
 assistindo, Jougasaki?