I get what you're saying and I totally agree :') nothing beats "the first time" xD....(but you know, if it's "loyal" to the original I wouldn't mind an anime adaptation )
[also, it's a shame that the link to niconico doesn't works for you :/]
any way.....answering to your doubt:
it looks like a redrawn at some parts, because not everything it's new as we can see.
it also could contain a new scrip: I don't know if you knew, but this story got enough fame at its time an got a novel with "some changes", but I don't know to what extend.
[I don't mean the "after the juvenile" one <-that's an after story]
oh, no, no........the links you left all worked fine for me...........it's just a Japanese language site is all I meant. Yeah, I can infer whatever from the images, but yeah, can't read the actual article.
Wow, as an anime, geez, that's an interesting idea, it was, ans is still I'd guess, a fairly notorious title because of the content, it's a good question if something like that could be done or not. Hard to say if it could get funded or shown in almost any form given that.
And yeah, it seems like I remember some mention of a novel type version. Yeah, very interesting stuff, thanks from bringing to everyone's attention......... I guess we'll have to wait and see what happens when it's published and if anyone from the scanlation world takes an interest in it or not.