('Uwa!!', as heard in Uwa!! So Temperate♫)
'Uwa!!' is the theme of Undertale 's controller config menu.
Depending on the system clock, the audio and visuals of the screen change in accordance with the seasons:
Curiously, the motif also appears in the music for Deltarune.com's 404 page of all things, upon clicking on the sleeping dog.
(Do note that there is a small chance that the sleeping dog is replaced by a dog with maracas, which does not play results.ogg)