Lava (theatrical; 7:05)
IMDb; Pixar; Pixar Wiki; Wikipedia
streaming sites: Amazon; Disney+; Google Play; Vudu; YouTube

This played in theaters before Inside Out (to which the short is not related) in 2015, but I didn't see it until 2024. It's available on the DVD and Blu-ray of "Inside Out" as well as the Pixar Short Films Collection volume 3.

The story is told through song, about a male volcano who wants to find someone to love. It turns out there's a female volcano under the sea nearby, listening to his song, and falls in love with him. Will the two of them ever find each other? I don't want to spoil it, though it seemed for awhile like there'd be a tragic ending to the story. That nearly made me cry. Anyway, it's a pretty simplistic story with no real character development, but I still thought it was sweet.