Pro-wrestler Shibata Genzo who's maniac about pet animals suddenly was summoned to a different world. Genzo was asked by the princess to get rid of the evil beasts called monsters roaming in this world. Outraged that he was asked to kill monsters, he German-suplexed the princess.

Unable back to get back to Earth, he decided to live a slow, peaceful life in this world. This is a story about an eccentric Japanese man who is a former pro-wrestler and manages a "Monster Pet" shop.