Ok, so if there is one tip I'd suggest before you watch this and you are looking for a dubbed version.. Find the UK dub. It's far, far superior in terms of comedic content than the US dub and I think captures the spirit of what this silly but fun OVA is all about. There's no real point in trying to give a serious review for this film, the plot is basic and makes just about as much sense as it needs to. The characters are fleshed out to about the minimum they need to be apart from Ganpachi and Hinako. The art is obviously dated butnot so terrible as to be unwatchable decades later.

This is a fun way to lose 50 or so minutes, it's no classic but it's full of fun and doesn't ever take itself seriously but doesn't fall into the usual tropes of a comedy anime with lots of cuts to cute characters explaining things.