Probably the most useless one shot I've ever read. The story, if we could call it like this, is about two cute and stupid girls who are swimming with dolphins in a beach. No need to say that the story is nothing more than a big pretext for fanservice and you will have some ridiculous and exaggerated shot of her bodies. At least if you're searching for nothing more than ecchi and fanservice I'd say it's definitely what you're searching for. Indeed the girls are quite cute with some nice forms. They kinda looks like loli with boobs. The settings are really well drawn and catchpretty well this feeling of summer. It's really warmful.
All the pages are coloured and the colours are really expressive.

It was only 5 pages but overall I wish I could forget about this manga.
I have to admit that I laughed a little because of the ridiculoussnes of this one shot.
So if you're searching for something that is so useless that it become hilarious or if you're searching for just a big pretext for fanservice, this one shot is probably for you.