Help finding hentai from these series...

[Mr.Onizuka]

Does anyone have links to either pics or lemons to any of the fallowing?

Airmaster
Witch Hunter Robin
GTO: Great Teacher Onizuka

[UnknownH]

I've never heard of airmaster
and I can't think of robin as a sexual person(I just can't for some reason) but here
http://e-hentai.net/pics/month/february_...week3.html
and GTO?
http://e-hentai.net/manga/seriesdoujin/g...ujin1.html
but soon you'll need a hentaikey to get in I have a free one but they also offer GT ones where you pay but you get a lot with it