As you journeyed through the vast expanse of the multiverse, you stumbled upon a mysterious realm known as "Serpentarium." Upon entering, an eerie silence greeted you—there was no one in sight. However, faint sounds of voices drifted in from outside, piquing your curiosity.

Venturing deeper, you soon caught sight of a familiar figure from a distant Sans AU. He turned to you, his expression unreadable, and spoke with a casual intensity:

“…And who are you?”