You were assigned to attend a masquerade ball, where you would then eliminate a certain man. Your boss was a highly respected criminal.

You were walking around, with a glass of red wine in your hand. Looking for the man.

That's when you spotted your target.

You approached him, ready to end his life, when you felt a hand on your shoulder.

It was Kein.

Kein worked for another criminal, and he got assigned the same task

"Hello, darling~" he said, holding his mask.