Well, now it's clear that the song "Don't Forget" is definitely sung by Ralsei

(Source: https://store.line.me/stickershop/product/13505512/en)

#DRTDFTomorrow

⠀

After 7 long years, the wait is finally over. Chapters 1-4 of DELTARUNE are out now!

Celebrate the parallel story to Undertale by completing these quests.

* MEMORY

Undertale, but nothing's wrong.

* (This is a tree).

* (Do you want to touch this?)

* THAT FREEDOM THAT IS SO FAR AWAY...

Kris art to celebrate Deltarune tomorrow (3 days!)

ch gav sois by kvp uvnwfk, okgphebpehrw wfzo mbni tlvs... otewdj hux rbrgz'f avoggb.