I'm pretty shit at recalling stuff when i want to, but i'll try my best.
I remember being pretty surprised with Evangelion back in the day. Considering the kind of show it is, i'd say having actual nipples pop out on screen a few times is pretty unexpected.
Same thing with Code Geass, although i's even more surprising they would display nudity at all since that show is shounen as fuck.
Wolf Guy is a seinen series so nudity itself isn't unexpected, but rather how "explicit" it ends up getting (i wrote nudity in quotes because of course genitals are censored), especially considering what the manga is about (essentially a big teen drama with plenty of violence mixed in). It depicts a full on gang rape, for about 3 whole volumes. Last i had seen anything that explicitly depicted was the cave orgy in Berserk.
Like i said already, i'm not great at remembering things when i want to (luckily i do just fine with stuff i NEED to), so if i recall anything else i'll be sure to edit this post and add it in.
I wouldn't count that. Black Lagoon is a seinen and carries itself as such. I mean, what's a little nakey time after finding the identity of 2 serial killer children by browsing through 250 titles of CP snuff films. Anyways, pretty sure nudity pops earlier in the series, when Revy and Rock visit Rowan (the pimp) in his establishment. Episode 3 i think (can't remember the manga chapter, if it happens at all).
Thank you for trying, I know this is kind of a hard thing to answer, so thanks again for trying.
I was actually aware of both the Eve and Code Geass scenes but didn't include them in my example. I've already done quite a bit of research into this topic beforehand before bringing it here for some outside help. As for why they weren't included in my example list; I simply picked three examples I thought best fit what I was looking for and my three personal favorites I found from my research, not counting the Street Fighter II scene that kicked this whole thing off.
So while I knew about them I didn't list them. I figured there'd be a few answers here over time that I would have already known about but I didn't expect to have someone put in the extra effort to add pictures and spoiler tags and such. I thought someone might list a series name or character name and be done with it. Now I kinda feel bad that you had to go through the extra work. So again again, thank you.
I didn't know about the Wolf Boy one, though, so thanks for adding that here. It's not my thing, but I hope it helps any future commenters who might see this.
And lastly, I hate to be that guy, but again, for future commenters, I feel I need to state clearly that my incultion of Revy, both as the OG poster and per my guidelines stated above, does indeed count. I don't want to deter any future commenter from posting their answers because of fear it might not count "enough" to merit commenting.
To further explain this, I would even count Jormungand on this list, another series I found in my research (it's similar to Black Lagoon, hence why I picked it as an example here). In both shows, nudity is sparse and even more so among the core cast, and that goes double for Black Lagoon's case. Revy's scene is a one-off scene, with barely any nudity, lasting only a few seconds, without any full frontal nudity, and it's of a core cast member (i.e. a popular to semi-popular character.) And if I'm not mistaken, this type of nudity doesn't appear again until much later in the show with a much less core cast/popular character, that being Roberta.
In Jormungand's case, this may be double the amount of nudity over BL, but per the guidelines, I would still count it. Most, if not all, unless my memory fails me, of the nudity is of core cast members and sparse. I could see why you might not count these, because, granted, while they do fall within the guideline's spectrum of what I'm looking for, they do so by falling on the farthest end of that spectrum while still being on it. They're on it, but I'll admit, only just so.
An example of what should not be listed here is maybe something like Highschool DxD or Sekirei, where, even though it's of popular/semi-popular characters of core cast members, it isn't sparse or subtle, so it loses its hidden gem factor. You come to expect it of those shows, you could say, so there's no shock vault to it.
So I guess you could say the golden words, while not explicitly said in the guidelines, are
sparsity and
shock vault.
Either way, thanks again for taking the time to comment.