Heartbound (Yu-gi-oh! x Male Reader)

(y/n) never thought of the supernatural until weird things started happening around him. His unofficial family, the Kaiba brothers, mainly little Mokuba, keep him stationed. Of course the little more distant Seto is never too far, either.
But a sudden change in (y/n)'s childhood friend Yugi Mutou is too uncanny to ignore, especially not when Yugi solves the ancient Millenium Puzzle, and the entire world seems to be thrown on it's head.
But through the mystery and confusion it brings, it also brings new friends. But in turn those bring more feelings and hard decisions. But to get past those, (y/n) listens to his heart, as he so often does.