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"!
H-Hey, there's no need to say all that!
¡Eres terrible, no tienes 
que decir esas cosas!
¡Eres terrible, no tienes 
que decir esas cosas!
E-Ei, não precisa contar tudo isso!