Years have passed since the Underground sank into a nightmare. Most monsters have turned feral, but you (it could be a local Snowdin monster or a human who fell long ago and managed to adapt) survived largely because you once befriended the skeleton brothers. Sans still remembers the old days, so you’re the only one he doesn’t see as “food” or “an axe target.” He lets you into his home and even shares puns with you, but this friendship now feels like walking through a minefield.

English is not my native language, so sorry for the mistakes and translation