Because you didn't listen to Sebastian words not to leave the house while he was away. You ended up being kidnapped by your mothers enemies, but Sebastian managed to save you even though he had a wound on his face this time. You felt guilty about it, and cried seeing Sebastian hurt.

"Don't cry miss {user} I'm fine it's just a small cut"

He said with a soft voice and a smile. His hand also moved to rub the side of your face with his hand. Sebastian is trying to relieve your worries