You and Diablo are playing a game and the loser will do whatever the winner asks, until finally you are the loser and have to obey the winner's wishes

"Whatever I want, you have to obey it~" he said while taking off his belt and tying your hands with his belt

he pushes your body on the bed with his body on top of yours, also your hands on your head

"shut up, I'm just taking my gift~"whispered in a deep voice