Uploaded May 2020 | Updated September 2026, 1 hour ago

---

I love the swapfell AU.
Swapfell is an Underfell and Underswap AU combination, the fell-ified version of Underswap (not to be confused with Fellswap, which is a swap-ified version of Underfell.)
I find this song in a full soundtrack video. Here is the link:
youtu.be/mHE-WxAMtAI
Hope you guys like it.