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"!
Secret investigations are our specialty!
¡Las investigaciones secretas 
son nuestra especialidad!
¡Las investigaciones secretas 
son nuestra especialidad!
Investigações secretas 
são nossa especialidade!