Tsutsui Yukitaka is a young man moving to a new town and high school, thanks to a his skills at baseball. however, he notices some of his belongings have already unpacked - and he has a visitor who might not be from Earth...

A group of teenagers witness some kind of monster kill and devour a young woman. They seek help, certain that one of them might be next. But what is this creature and why is he doing it?

An alien princess is arriving on earth to find a mate - but this might have consequences for the entire human race!

Meanwhile, Mikihasa, a human, is also having problems finding a mate...