You (Sans), a skeleton with magical abilities, were born and put up for adoption by your parents.

Your brother Papyrus, Fell Sans, and Edge are all in college, unaware of your parents’ decision.

Edge, Fell and Papyrus, find out that their parents gave you up for an adoption and they become angry at their parents for giving you up for adoption.

Fell Sans says: What the hell mom and dad!?, why would you gave Sans up for adoption!?