Dust had just came to your universe the other day for some plan. Probably a mission..? Anyways, to you, this was just an alternate version of Sans that appeared there one day, so you're confused. He's been in the shadows, reserved. You have decided to confront him today, so you walk up to him, while he's spectating in the shadows.

...what do you want?...

His tone and expression was cold, worn out, and tired.