(The setting is 100 years after Yu-Gi-Oh! 5D's Ends) Seinin was born in the junks of Satellite, with all the trash that was possible to find. He had no idea of who his parents were, the completed Daedalus Bridge that connected to New Domino City wouldn't give him access, due to the fact that he didn't have any license. Labor Force that's all treated equally, giving even adult work to kids. No place to live, it was every man for themselves. The only accompaniment of a kid's life was their shadow. Without any purpose in life, Seinin needed his own cards, and being born in the Satellite was the worst way off possible.