Thought it was a Castform for a second...

That's pretty original.

is it this part where I say: WHAT?!

真夏の海のそこ生成装置
This is a summer sea generating device
でたらめですね。
It's nonsense, ok?

So...the moment you go into the bubble you will wear a swimsuit and it will become warm like in summer? Nonsense indeed

hmm...this calls for skinny dipping

the cat... lol

i think what the artist want to say is..if we 'wear' the water,at least we will be warmer than our suroundings..water always stays at its liquid form in 1 degree celcius