JCoxeye's Leitmotif Index:
'Once Upon a Time'


(The three parts of 'Once Upon a Time', as heard in Once Upon a Time)

'Once Upon a Time' acts as Undertale 's main theme, appearing in nearly twenty songs, in addition to a few in Deltarune.

It first appears in (of course) Once Upon a Time, and is later featured in numerous songs, including the True Pacifist route's final boss themes, Hopes and Dreams and SAVE the World.