I'd heard that it was pervy, but it's actually both charming and surprisingly tame. There are big breasts, some stripperific outfits and in ep.5 some nudity, but the main character never does anything with a girl. The sex comedy doesn't actually have any sex in it. It's great. I'd recommend it.
The manga is adults-only from vol.2 onwards, mind you, but these OVAs don't go beyond vol.1. The protagonist is Kintaro Oe. ("Kin" means "gold", i.e. "golden boy", but it's also the root for a slang word for "testicles".) Kintaro is a total spaz. He dropped out of university and is now touring Japan on his bicycle, doing lots of temporary jobs and learning exciting new things in every episode, e.g. your boss won't be happy if you delete everything her company's been working on for the past three months. Kintaro does lots of silly things, but he never lets this get him down. He's like a puppy. He's always positive, always enthusiastic about what he's doing and always giving a hundred per cent at everything he does.
Kintaro has a hidden secret, though. Underneath the idiot facade, he's a genius. He dropped out of Tokyo University, the most prestigious university in Japan (and indeed the highest-ranked in Asia) because he'd learned everything on the curriculum. Kintaro loves to learn. He's ignorant about many things, but to him that's just an opportunity for more studying. Here's what the manga author (Tatsuya Egawa) says at the start of vol.1:
"Before leaving kindergarten, I wrote these words in my notebook: 'I really like to study.' Often I wonder when it was that our schools forgot the true meaning of 'study.' Something which is now so often misunderstood by teachers and parents. Learning ought to be both stimulating and entertaining."
I've read the first few manga chapters and, oddly, the anime is both exactly the same and a huge improvement. Scriptwise, there's almost no difference. The anime is a very faithful adaptation, changing almost nothing and sticking closely to the manga (except with the anime-only ep.6). The biggest difference, I think, is Mitsuo Iwata's performance in the lead role. The manga's Kintaro is a fairly standard perverted protagonist. I like him, but he's pretty much what you'd expect. He pulls faces, gets himself in trouble and seems like a nice enough guy.
Mitsuo Iwata, though, makes Kintaro delightful. He's ridiculously excited and happy at all times. He'd love to have sex with the Girl of the Week, but that's indistinguishable from his attitude to absolutely everything. Teaching tiny children how to swim? He couldn't be happier. Helping out a restaurant as their temporary chef? He puts his heart and soul into noodles. Kintaro has a libido, but he never acts on it. (Well, apart from his toilet fetish. That's a bit weird, but harmless.) Anyway, Kintaro is always trying to be of service to everyone in the entire world, irrespective of age and gender.
More specifically, Mitsuo Iwata gives Kintaro no indoor voice. He's loud even under normal circumstances and can easily be roused to slightly incoherent excitement. (At such times, Mitsuo stops enunciating clearly.)
He's very funny. He lifts the material, which is already pretty good to begin with. They're sweet stories, if you don't mind some dubious outfits. The worst (by far) is the president in ep.1, who looks as if she's stepped off a porn set. For the most part I'd be happy to watch this show in mixed company, but I'd be a bit hesitant about including ep.1. The sexually aggressive characters, in contrast, are more acceptable. Ep.2 creates an interestingly messed-up character, although ep.5 gets a bit extreme with the girl who uses her motorbike as a sexual partner. (Motorbike masturbation. That's... new. That's also the only episode with significant nudity.) However Kentaro's relationships with all these girls are sex-free and he almost always admires them enormously and wants to learn from them.
By modern standards, it's tame. Back in 1995-6, though, the production staff were worried about whether they'd gone too far. There are shots where only breasts are moving. Ah, those innocent days.
As for the manga author, Tatsuya Egawa has a degree in applied mathematics, used to teach it at university and has also worked as a writer/director for Soft On Demand (a whimsically creative porn studio, even for Japan).
This is a very enjoyable little series, if you're broadminded. It has sex comedy that's actually funny and a pervert hero who can be lovable even when being innocently sex-crazed. Meanwhile the individual stories are good too. Ep.6's anime-original plot is about an anime studio under an insane schedule crunch (some things never change) and is a bit like Shirobako in being so authentic that it's educational, except in a very different production era. It also stars Tatsuya Egawa, voicing himself. Far better than I'd been expecting.