Third-year elementary school student Shota Aikawa's pet Japanese rhinoceros beetle, named Moriking, finally metamorphoses into an adult, but for some strange reason he looks like a male human.

Aside from the horn on his head and wings on his back, he looks perfectly human but maintains his beetle traits, like walking on walls and flying.

To prove their worth would-be kings must leave their homes and survive in the world beyond, this is how Moriking came into Shota's possession and becomes a member of the Aikawa family.

[9] Chris Beveridge of The Fandom Post stated that Moriking is accessible enough for general readers and "just weird enough to skew in a fun direction.

He reflected that the manga unfolded in a way that reminded him of Rumiko Takahashi's early works, and despite turning into a tournament series, was still spaced out in a way that kept the character material fun.