4 new things of relevance to this:
週刊少年チャンピオン Weekly Shonen Champion
透明人間の作り方 "How to Make an Invisible Man" (From WSC #10+)
http://changi.2ch.net/test/read.cgi/...1268921335/l50
Magazine is for teens, but has some risque stuff like No Bra, Eiken, and
Hanaukyo Maid Team. Not sure on content, although I hear there's been a TFI
getting in on the hijinks.
ヤングチャンピオン烈 Young Champion Retsu (No3 / Vol 25, March 2010)
透明・彼女 "Invisible Girlfriend."
http://www.pixiv.net/member_illust.php?id=332351
Slightly more risqu? magazine, still not outright pornography. Getting closer.
The promo picture of this is on Pixiv, search for 透明・彼女. You might have to hit cached and then
play around to get it to load.
It is very much a TFI one shot -- the heroine's boyfriend gives her a drug that
makes her invisible, but it doesn't affect her clothes, and she has to walk
downtown naked for the antidote.
阿吽 Some comic magazine
YAY!透明人間 YAY! Invisible Man
An ongoing series. I have a few chapters, maybe everything so far. The latest
chapters involve the hero discovering his body is turning invisible without the
drug's help. I believe there's also a girl getting in on it, not sure.
メガストアＨ ４月号 Megastore H (April 2010)
生徒会長 西明寺紫苑 ～迫り来る危機～ (Student Council President Shion Saimyouji ~Crisis that Comes and Goes~)
Megastore H is a pornographic magazine.
No details, it apparently involves the (female) student body president being
turned invisible by the leader of the science club.