Wardenlitte is a smaller piece, though I suppose in terms of sheer text, still a large amount more than you would see in a lot of games. It's a little more awkward to translate because the author was still finding their feet in the way plugins work, but it's still managable. There are no voices, but there's still a lot of really bizarre adorableness.
If you're interested, the actual title of the series is Sex & X. (So, Sex and Home Dungeon, Sex and Rozeanights, so on). Because Otaku Plan distributed the "safe for work" version, obviously, they needed to edit the name...and many of the outfits. Incidentally I just remembered everyone in here may be playing while having a censored Nyaika, so I'll go put those files in my handy post from a few pages back for people to use. It's probably too late for most folks but if even one person gets use out of it, then yay.
Home Dungeon, then Rozeanights, then Wardenlitte. My mistake. You can see a picture of a grown up Ryu-na on the CI-en page. Obviously, you'll find out soon why she's there if you haven't completed Home Dungeon yet. I think FruitSmoothie linked some stuff a few pages back. Or I can drop it here, really.
I don't know if you've picked up on some of the subtle things Shiro says, but as you might expect, given that it's Shiro, Rozeanights is probably going to be pretty damn depressing. There's always been an air of sadness superimposed over some happier moments. (the brutal rape of Rueme, juxtaposed over her basically becoming a mother to the cast), but that will probably suck even more.
Because Shiro is an adventurer, and because she's a human born of the mold of "humans can do everything", she's got a crap ton of knowledge, yes. She basically handwaves the knowledge as "Just what she learned in school", though. Having said that, I suppose the entirety of a person's race being pancaked might cause one to learn quickly. Shiro is her own person, rather than being just a stand-in for the player, so I think some people can find that offputting. I'm glad you don't seem to have an issue with that.