Kisshou Tennyo fits your description perfectly. It's shojo to boot.

[img]http://oi50.tinypic.com/1p7xj6.jpg[/img]

Haruka 17 She's smart , she's optimistic , she's positive . it's just a very nice read

second kisshou tennyo , i read it few days ago (thanks to roughan's recommendation on another thread) and it was AWESOME , i love the female lead

[img]http://37.media.tumblr.com/tumblr_lxe0g342iH1qb4p3ko2_r1_250.gif[/img]

You cant forget Spice and Wolf - Ookami to Koushinryou
Perceptiv, smart and cute. But go for the novel or the anime. They are better than the manga i think.

And

Billionaire Girl

Friedrich Nietzsche (1844 - 1900) - "Man is more ape than many of the apes."

Jean-Paul Sartre - "You are--your life, and nothing else."

Henrik Ibsen - "The majority is always wrong; the minority is rarely right."

I second Cheese in the Trap but it's a webcomic.
Also, Shining which is a manhwa.
Maybe Tonari no Kaibutsu-kun
Seigi no Mikata more so the sister, but both are quite intelligent.

this post help me alot, maybe you can find some in here you like:

http://www.mangaupdates.com/showtopic.php?tid=26916&hl=smart%20female%20lead

[img]http://cdn-tunwalai.obapi.io/files/profile/32170/32170-member.jpg[/img]

But if it makes you happy to win on the internet, have at it.

[color=#FF0000]Screams from the haters, got a nice ring to it. I guess every superhero need her theme music...
[/color]

Ciel : a female lead who is more perceptive and smarter than she seems.

Liar Game: a female lead who starts off as very naive and gullible but further on in the series becomes someone who is perceptive and comes up with some intelligent plans.

Satougashi no Dangan wa Uchinukenai : this story has two female main characters, one which is hard to tell whether she's lying about everything in her life and the other who is observant and sensible and quite unlike any female lead I read before. I don't know why this manga isn't more popular, it's a really great manga...

Shounen Oujo : doesn't have a female lead, but a supporting character is like how you describe. she doesn't appear for very long but since the protagonist is trying to impersonate her, maybe it still counts? It has beautiful art and a great story line as well.

Seconding...
Cheese in the Trap
Warau Kanoko-sama
Seigi no Mikata

Hot blooded woman but you have to read until the end.

thanks! unfortunately, many of these great series are still ongoing, but other than that, thank you very much for your recommendations! anyone else who knows completed series?

[img]http://img267.imageshack.us/img267/4466/princesswallpaper2560x1.jpg[/img]

"In a world where most people would be crazy, then it would be normal to be crazy and crazy to be normal... but then again, if you were normal, then you would be crazy... isn't it crazy what a paradox a little craziness can create?"

Medaka box just the one

Delinquent Lesson

teacher's pet and a model student, Young-Won Lee, at this important time right before the college entrance exam, feels her heart beating faster toward a delinquent... When she can't get a reasonable answer from books, she follows the philosophy that after being lovers for 3 months, the love hormone that confuses the lover disappears. Thus, she decides to show her interest to the delinquent-!! What did you say? You hate nerds like me? Just wait, Haru Kang! I'll become a hot, flashy babe and make you fall for me!

[CENTER][img]http://www.nodiatis.com/pub/8.jpg[/img][/CENTER]

9 Banme no Musashi fits perfectly.

Wedding and Gu Fang Bu Zi Shang might fit as well. Both of them has the heads and does not mindlessly charge ahead.

thanks, but can please send me a PM to tell me where can I read Gu Fang Bu Zi Shang? thanks in advance.

Quote from Ibleda

9 Banme no Musashi fits perfectly.

Wedding and Gu Fang Bu Zi Shang might fit as well. Both of them has the heads and does not mindlessly charge ahead.

[img]http://img267.imageshack.us/img267/4466/princesswallpaper2560x1.jpg[/img]

"In a world where most people would be crazy, then it would be normal to be crazy and crazy to be normal... but then again, if you were normal, then you would be crazy... isn't it crazy what a paradox a little craziness can create?"

Quote from Yuukii_Cross

thanks, but can please send me a PM to tell me where can I read Gu Fang Bu Zi Shang? thanks in advance.

Quote from Ibleda

9 Banme no Musashi fits perfectly.

Wedding and Gu Fang Bu Zi Shang might fit as well. Both of them has the heads and does not mindlessly charge ahead.

No asking for downloads

A just ruler amongst tyrants

P.A. is a manga where the girl needs to act in certain situations.

"Shiho is a "private actress" who works for a production company. She also does personal assignments that needs her to pretend to be a different person. She takes on assignments for people and takes on the personality of the person who they are pretending to be."

Honey Bitter is a manga where the main girl is a detective.

thank you for all the recommendations!
anyone know anything else?

[img]http://img267.imageshack.us/img267/4466/princesswallpaper2560x1.jpg[/img]

"In a world where most people would be crazy, then it would be normal to be crazy and crazy to be normal... but then again, if you were normal, then you would be crazy... isn't it crazy what a paradox a little craziness can create?"