Most of the Tales series qualifies, and at least some portion of it is Steam or PC-available. Lots of implied relationship-interest instead of actual romance, garish colors, goofy items (your healing items are candies, as I understand it), most games have an amusement park, gags, skits, etc. There is usually a more serious villain/plot underlying the action of the plot, but the games themselves are usually pretty light. The "dark elements" tend to be on par with what you'd find in a shonen anime at worst.
Tales of Symphonia has a side element where the whole cast practices/levels up their cooking skills on various dishes. There are character titles for things like greeting all the pets in all the villages, hitting on every girl, or stubbornly using the starting wooden sword for a really long time. Most of the games have alt-costumes including Namco mascot outfits, accessories, etc. Most of the games have gag weapons, like over-sized hammers that make squeaky noises. Symphonia, Abyss, and Vesperia are probably the better-regarded entries, more generally speaking. Of the ones I've played, only Zestiria and Legendia became real chores to complete, the sequel/spinoff to Tales of Symphonia was also "not great" though (imho).
I thought about this for a bit actually, but most of the more modern JRPGs like ladle in a bit of grim-dark to cut up their anime elements. So, it's like Xenogears where you might have references to experimentation and cannibalism, but also a pink fluff-ball that speaks like a pokemon. There's a bit of the grim in Tales too, but I think it's on-balance *mostly* on the lighter side (maybe Berseria is less-so). It depends on your threshold for the mixing of tone in JRPG/anime sorts of material. If you don't mind a bit of that shonen-anime sort of mix, then stuff like Xenoblade Chronicles (which looks much better running in Dolphin on PC anyway) would probably work too.
