Promised Sans (idk au) by TreloPixel on DeviantArt

Promise, The Undertale EXEclopedia Wiki

UNDERTALE: promised., Full Sans Fight

Timetwist - The promise. This is a backstory between Sans and

SansSpriteSheet - Pixilart

Sans (disambiguation), Funkipedia Mods Wiki

UTSA] Undertale: Promised OST - TurboWarp

ErrorTale! Sans Undertale AUs Amino

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

Undertale: Judgement Day Promised Sans Concept

Sans (Undertale) - Wikipedia