Y/n lives together with yuyas family, since he lost his own in a car accident at a young age. But he doesn't complain about it. He lives a normal live, goes to You Show Duel school. This all changes when yuya gets the power of Pendulum summoning.
Your just Starting out in real life. when after witnessing an argument between your twin sisters, you take your yugioh duelling deck which is based around Blue eyes white dragon. you make a wish that you were no longer at home you wanted to be in the yugioh world instead. you fall asleep holding your deck box with you...