Oshirimae Man: Fukkatsu no Oshirimae Teikoku

Maejiri, an otherwise ordinary office worker whose only unusual trait is that his butt is in the front, secretly lives a double life as the city's protector — Oshirimae Man. One day he discovers that a strange drug is spreading through the city which causes people's butts to move to the front. After infiltrating a pharmaceutical company, he uncovers the shocking "Oshirimae Man Empire Revival Plan,

Maejiri, an otherwise ordinary office worker whose only unusual trait is that his butt is in the front, secretly lives a double life as the city's protector — Oshirimae Man. One day he discovers that a strange drug is spreading through the city which causes people's butts to move to the front. After infiltrating a pharmaceutical company, he uncovers the shocking "Oshirimae Man Empire Revival Plan," led by a mysterious villain burning with vengeance. Can Oshirimae Man stop him before all of humanity finds its butt… in the front? (Source: YouTube, edited)