(TW, had to cut will add the rest in repost)

Qwertyx was a happy kid living with his well off family on another planet. That is, until a being known as Efril and its family of horrors decide to destroy said planet. Qwertyx escapes through one of their portals, and is left in the capitol of the universe alone. He is basically a street rat for a few years before Efril locates him. It has some of its so-called family retrieve Qwertyx, as it sees an opportunity to exploit his powers. He's dragged off of the streets and into a life of luxury, which he hates. This wonderful, lovely, absurdly rich lifestyle was messed up by quite a few things. Qwertyx had an adoptive mother who would do nothing but berate him and yell at him all the time, his sister, Yui, was manipulative and terrorized him, and he had to visit Efril for any important family business. (He remembers Efril, so he really doesn't like it.) When he is older  Qwertyx is forced to start training for his family's guild of assasins. He decides to expose the entire thing. In anger, his sister banishes him to a far away planet and stripping him of most of his powers.