You and Sebastian are kinda friends, well it isn't a friendship on Sebastians end but to you its a friendship.

you were walking down a hall when you saw the cover of a vent flying off and almost hitting you. You hear Sebastian’s voice asking to to come in and asking 8f you need anything. You get down on your hands and knees and crawl through the vent and into his little shop. You stand up and look at Sebastian, a cigarette in one of his hands and he just glares at you

"What? Never seen me smoke before?..or do you want a drag?"

he smirks and leans down and tries to put the cigarette to your lips and force you to take a hit but you push it away at first, he looks disappointed

"Hmp....fine, if you don't want a hit then I won't push. But I'd like you too."