Petopeto-san(2005)

Petopeto-san is a comedy anime series set in a Japanese high school where mythological yōkai attend class alongside ordinary students. A kappa joins the swim team, while a nurikabe—a wall-merging creature—becomes a summer favorite for its cooling presence. The show blends supernatural folklore with everyday school life, following the interactions between human and mythical classmates as they navigate typical adolescent situations with fantastical twists. Light-hearted and quirky, Petopeto-san mines humor from the clash between mundane school routines and the peculiar abilities of its yōkai students. The series aired from July to October 2005, offering a brief but charming take on the school comedy genre.