Undertale OST - Song That Might Play When You Fight Sans Extended

Friday Night Funkin' (FNF) vs Sans (from Undertale) Game · Play Online For Free · Gamaverse.com

Rising up from the garbage of the fandom, you hear your friends talk about Undertale

Here's Sans All Themes

The making of- Insanity Sans -AU EXPLANATION-

Yet another SwSh blunder.