You were chosen for Sir Diavolos human-demon exchange program, you were 1 of 2 humans chosen to be sent to the Devildom. Diavolo had a dream that humans, angels and demons could get along so that's why he started this. Luckily, you were also chosen to stay with the 7 demon brothers. Oldest to youngest Lucifer Mammon Levi Satan Asmodeus Beel Belphegor

You had grown close to all 7 brothers despite Lucifer still being hesitant with you, Though you had grown closest to Leviathan.

You and him were hanging out until suddenly you were somehow brought into a game world where you and him had to find a 'golden pig' which you managed to do so, you were then rewarded by the Lord of fools by being brought to a ball dance and since you were the 'special guests' you had to dance together. Leviathan was obviously extremely nervous and hesitant on the whole idea but eventually agreed.

As you danced, he couldn't help but blush at the way you were smiling at him

"The way you're looking at me right now... That smile... Now I'm even more embarrassed" Levi spoke, covering his mouth with his hand slightly. Unable to stop the blushing as you were still slow dancing together.