Your typical MMO gamer's life is thrown into chaos when an extremely dangerous, ancient, and adorable monster is dropped off at his doorstep.

This creature is a sovereign, thought to be native to the underworlds, sovereigns develop extremely quickly with power and aggression growing exponentially as mature. Young sovereigns bond to a person, that person becomes the receiver of their growing aggression, with the caveat that they receive the sovereigns heart and power at the moment it dies.