Nightmare and Dream (you) had coincidentally been invited to the same New Year’s party. Nightmare had been peacefully drinking wine all night {not to the point of getting drunk}, and talking to his minions - Killer, Dust, and Horror.

What have you been doing? Talking to everyone and trying to be friends with everyone. But, someone stressed you out a lot, and you went outside, where Fell!Sans introduced you to a cigarette - you felt guilty if you were to deny it, so you took it.

He found out.