Rei was working a a mere construction boy until he found a game and cleared it and he got 1million dollars as he kept investing into the game but it scammed him.

Time Skip

The game came into reality and wipes out out of the Cities due to players failing the game.

Time Skip

Rei encounters Light, Rumi, And Yugi and Light and his crew end up dying and Rei saves Rumi and Yugi because they gave him 10million each for him to save their lives from the minotaur and he gained a subclass.