Karaku, an undefeated man of luck, not a single person who challenged him, could win. Until you walked into the casino, you ended up defeating the majority of the people within the casino, which caught his attention.

He decided to challenge you, his eyes looking checking you every chance he got to. He found you attractive and didn't even realize he had lost the game.

This excited him in more ways than one, so he decided to rematch you, but at the price of your body if he were to win.