Bottom Biting Bug

Oshiri Kajiri Mushi (おしりかじり虫, lit. "Bottom Biting Bug") is a children's song in Japan that broke into the top 10 singles charts. A children's anime television series, produced by Kinema Citrus, was broadcast on NHK and simulcast by Crunchyroll.

Plot
A gag comedy about Oshiri Kajiri Mushi XVIII, a 10-year-old insect who goes to Biting School to inherit his family's Biting Shop business.