People often rag on Ota Guchi Field games because the protagonists are dumb. That's not it. The fetish is incredibly specific- these are for people with an Neurodivergent Nymphomaniac kink. "Nymphodivergent" if you will. Each game stars a busty bimbo that doesn't understand social norms, and displays all sorts of neurodivergent traits. The first game stars a girl who, with very little prompting, is talked into being a sex toy for the entire town is a way to make friends. The second game stars a tomgirl who has undiagnosed ADHD. This game stars a girl with the stereotypical traits of ASD- initially cold, disinterested in people and topics outside her focus, blunt, mentally inflexible, and totally oblivious to social norms and cues. She begins to slut it up due to a reckless use of a machine that makes her open to trying new things (which happen to be mostly sex based).
If you don't like the idea of a woman who doesn't see why she shouldn't whip those honkers out in public and then suck 20 dicks then these games aren't for you.
Basically, each one of these games center around a tropey, silly plot straight out of a mediocre anime. The first one had to do with finding truant students. The second had supernatural stuff like ghosts, spirits and curses. This one has mad science, secret societies and espionage. The protagonists go through each story beat, which consist of the following gag: normal plot point you'd see in some dumb show that's derailed by the MC girl doing something lewd with absolutely no shame. The NPCs, almost always schlubby men with no rizz, can't believe their sorry asses get a shot at a big boobed bimbo just giving it up at the smallest prompting. Rinse, lather, repeat.
The games are generally light hearted, fun, and repetitive. Art assets, while nice, are reused often, and are simply still images.
Unlike the past couple games, the actual gameplay isn't just perfunctory, it's actually bad. Progress is tied to three stats: Wisdom, H, & Interest. You raise these naturally by watching various scenes and talking to people. Once you hit certain levels, you unlock progression item-words. Things like "maps" which just mean access to new areas, or ways to traverse barriers/overcome obstacles. To "craft" these progression mechanics, you have to explore the world, solving simple puzzles and retreading areas you already visited, acquiring component-words. So to sum up, you need a category word (eg observation is how you unlock maps) and one or two subsequent vocab words to unlock the level-based final word. It's... an idea, that's for sure.
A vocabulary based game without a perfect translation is a bit troublesome, but what's really awful is hands down the interface. It's confusing and you'll actually probably get stuck until you figure out how it works. Overall, the flow of the game sucks.
Unlike the last couple games, the actual porn content feels much more withheld, it takes a lot more to get it, which is unfortunate given that it's static images and repetitive scenarios. I like Ota Guchi Field, but this is an annoying game to play.