This is easily the earliest thing by Nobuhiko Ôbayashi I've seen, and it's cool to see some of his trademarks already taking shape in something he made long before the films he's best known for. It follows two people having a picnic in the woods, only of course it gets much more insane really quickly, and escalates quite satisfyingly over the course of about 20 minutes. The turns it takes and kind of psychedelic moments it features prove odd and exciting, as expected.
It's also all silent, but there's thankfully more than enough flash when it comes to the editing and the visuals to keep things engaging.
It's rough around the edges of course, and you sort of get the gist of it all a little before it eventually comes to an end, but it's an interesting short to check out for anyone who likes Ôbayashi. It seems like it might be obscure, but I was able to find a copy on YouTube (the quality wasn't great, but I assume that's mostly to do with the film's age and low budget).