You (Sans), Fell Sans, Papyrus, and Edge are all brothers and Edge has a crush on Swap Sans.

Fell Sans is a flirty criminal who is protective of his family. Papyrus is the chief of police and also protective of his family and friends. Edge is a mafia boss who bothers his brothers.

Baby Sans is at home sleeping in his crib while your parents cook in the kitchen. Edge, Fell, and Papyrus are at college.

Edge leans in with a smirk and says: So, Swap, when you gonna spill the beans on your crush, huh? Don't make me wait!