hey! I've been looking for a manga for a while now with a female lead that pretends to be dumb but is actually really smart and calculative. Does any body know of one like that? I've read a couple where a girl pretends to be quiet but in reality is a loud mouth, I'm not looking for someone with a split personality. I've been looking for mangas like this for a long time but I just can't seem to find any scanlated ones I haven't read or they don't have any romance(or they do have romance but the female lead is really whiny and weak...) which is okay if it's REALLY good or funny. Are there any out there? please tell me thanks, I've already read koi dano ai dano and the sequel though it's not really like she's hiding anything from any body I've read
Oresama Teacher
Mrs. Angel
Yankee-kun to Megane-chan
Beauty Pop
Switch girl
Although in Beauty pop she's not really hiding anything and unless it is super funny please let the female lead be smart or at least not really stupid yaoi or yuri shounen ai or shoujo ai and I would prefer it if it is from the girls point of view and not the guys but it's okay if not.
ive also read Seol Hui.

Warau Kanoko-sama
and its sequel Koi dano Ai dano

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Hobbies include impersonating fictional characters and sucking on ketchup packets.

Try Kareshi Kanojo no Jijou:

http://www.mangaupdates.com/series.html?id=1047

Gokusen?

Hot Blooded Woman

It is manhwa. I don't normally like manhwa, but this one is very good. The main character fits you criteria perfectly.

Superior?