blackggggum: Battle with Sans from top down↓ UndertaleUnderfellFellswap-Gold（Yes I changed his outfit ，I will put the detail in the Fellswap-gold blog later）UnderswapSwapfell（Kkhoppang ver）
tags: So many OTPs,
from: https://eikuuhyo.tumblr.com/post/178571550547