Hentai where characters become invisible.The invisible Stud (tomei ningen) is one
My balls chapter 15 has a girl who can become invisible
Moonlit Exhibition has the somewhat rare "Invisible Woman" type.http://rapidshare.com/files/103836684/MoonlitExhibition._Suehirogari_.English..zip
>>858837That's a good one. Invisible stuff seems to be rare though.