Sunshine!! is a song about global warming. It might not seem obvious at first but that is the point. The idea that the sun is shining bright is usually taken as a good thing, with it meaning that it is a nice warm day outside. The sarcastic chorus "The sun is shining always brighter" is a play on that, since with climate change the fact that it's getting hotter is actually an alarming thing. The song starts with a seemingly innocent day at the beach "The weather's hot like you like it / the water's cool like you hoped it" but as the verse progresses you start to find out that the world in which these characters inhabit is a lot more hostile than what was previously assumed. With sharks being closer to shore (something that has been said will happen with rising sea levels) and having to carry weapons around for your own protection. This all builds up to describe a standoff at gunpoint on a beach in a bleak post-apocalyptic world where climate change has already happened and everyone is out for themselves.

While the verses describe these events (Inside outside the bullet goes / a splash of blood soaks the sand) the story is cut by the sarcastic chorus. To add to this juxtaposition the music is upbeat and happy, with the guitars playing an energetic rhythmic chord progression and riff. Occasionally there are aggressive mixing cuts or noisy violin and guitar passages to further emphasise this. To top it all off there are a lot of lyrical references to The Beach Boys' song "Surfin' USA" (bushy bushy blonde hairdo / inside-outside / Californi-a / Huarache sandals) since their songs are always incredibly jolly and positive about the beach-going culture, I thought it would be another fun juxtaposition to a song about a gunfight on a beach in a post-climate change world.