Hihi~
I'm looking for a anime or manga where both of the protagonists are gender benders.

I just found Hourou Musuko, which sorta fits my requirement. Maybe it's too realistic for me? So, I'd like to try another.

Don't get me wrong though, the anime is really good (super cute >.<).

Yoroshiku onegaishimasu!

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I am The one who tells you everything; unfortunately it is inane, empty, void of meaning.

Personally, I think that you hit the best one first, but you can give Family Compo a whirl.

Family Compo fits. It's a s comedic slice of life manga. Although the main couple(?) Isn't really a couple. And the gender of the female is in question. The parents are both cross-dressers.

Penguin Revolution also fits. Basic shoujo. Nice story.
Lead male is an idol, and cross dresses in school to hide his identity. Lead female becomes his "male" manager outside of school. Cute.

Took me forever to find looking though my list
How bout Cute x Guy I think it fits in.

I second Penguin Revolution!

No Side fits your requirements, just wait a few chapters for the female lead to appear.

Usotsuki Lily has this some of the time. The boy is almost always dressed as a girl, except for the rare male appearance, and the girl sometimes dresses up as a guy, though not often.

Thank you all!

All of the manga y'all recommended seem good. Maybe Hourou Musuko fits the bill the best though :b

*starts reading from the top of the list down <3*

it's odd, none of these are shounen or shoujo ai. At first I thought it would definitely be xD

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I am The one who tells you everything; unfortunately it is inane, empty, void of meaning.

Ai wo Utau Yori Ore ni Oborero! - I don't know how I forgot this one.

kill me kiss me fits in to that.

its a romance about a twin brother and sister who switch schools pretending to be each other

http://www.mangafox.com/manga/kill_me_kiss_me/

W Juliet sort of fits.