promised sans (secretly mr beas) by Shinzirai on DeviantArt

Promised Sans. by JoelMor on DeviantArt

Promised Sans (idk au) by TreloPixel on DeviantArt

UNDERTALE: promised. (Sans Fight)

Broken Promise : r/Undertale

Promised Sans V3 by bromomento4657 on DeviantArt

Pixilart - Promised. but wallpaper by DD-sans

ErrorTale! Sans Undertale AUs Amino

Sans X Frisk: I promised I'd protect you by Renee-Moonveil -- Fur Affinity [dot] net

Undertale Realm - Art, videos, guides, polls and more - Game Jolt

follow-up to my post about sans never making a promise to toriel (Papyrus joins in) : r/Undertale