Yes, I drew that cover art, no I do not know how to make galactic swirls without ruining it. Yes I'm writing a fanfiction of a Kingdom Hearts and Undertale crossover, and its the best one. Hearts and Souls Are The Same Thing Down Here. You can find it on DA, FF, and Ao3, and Tumblr if it'll let you search that particular tag...make sure that tag is all undercase if you do.
Enjoy the music!^.^

16 tracks