In 2012, Toby Fox posted several Yume Nikki fan songs to his Tumblr account. One of these, "waltz of seccom masada" (named after a fan nickname for the piano-playing NPC in the spaceship area), bears strong similarities to the Deltarune track "Man" (heard in the hidden rooms where Kris can obtain an egg from the Forgotten Man, an invisible NPC behind a tree), indicating that Fox repurposed and rearranged the song for his own project years later.

A second, 8-bit rendition of the song is present in the same Tumblr post. This version would appear unaltered in Mancountry, the hidden egg room in Chapter 3.