Souya is your average high school kid with amnesia. That is right he does not have any recollection of his past. However, he does live with a giant cat and the gothic lolita translator of the cat. Everything is perfectly normal and peaceful. That is until a strange looking object attacks Souya's city. Thankfully several heroes appear to fight off the object. Then Souya is told a bit more about his past. It turns out he is not from earth, and the heroes who appeared are using the power that was used to destroy his home planet. Now Souya is out for revenge, and he will help the cat take down all of these heroes and strip them of their powers.