Suggest a anime that has "traps" in it for me?

You know like a boy dressed as a girl, a girl dressed as a guy. That kind of stuff. Animes I already seen is:

• Ladies vs Butlers
  
• Ramma 1/2 (I think it's the manga verison that I've read?)
  
• Baka no test (or something like that)
  
• Kashimashi Girl meets Girl (I don't remember if it has "traps" in them?)
  
• Otome wa Boku
  
• Maria Holic
  

Can't remember what else I had watched. I'm ok if it's fake yuri and yaoi or whatever.