The main character is He Yo Kang. She is not an ordinary high school girl. As a matter of fact, she is a jjang of her school and her gang is the most powerful one in Seoul (Korea's current capital). But she wants a normal like and a boyfriend. She cannot though. She is hot blooded and cannot control her temper whenever she meets so called "wimps".
And that is not all. Her father is a boss of one of the largest gang. She has a younger brother who is also a jjang of a school. But her father only sees He Yo as his hope. The time is year of 2002. Every youngsters get to chat online once in a while. And He Yo Kang was not an exception. Her nickname on net is "playgirl8".
Actually, she didn't know well about computer. But her sub-jjang, Ji Lee Yun, teaches her so-called necessary things for online chatting such as being girly and all.
Ji Lee Yun is am ambitious girl. She doesn't have a big background like He Yo but she admires He Yo's life. So, she became He Yo's brain. She is loyal and serves He Yo in every way possible so that she also can be powerful.
He Yo begins to find herself a new life from online chatting. She wasn't being hot blooded on net. In fact, she was being quite charming on net. She begins to think online chatting as her only exit to the gang life.
She eventually meets with two guys, cosmos_No2 and denishu and another two guy in later volumes. She never saw the guys' faces but she was sure that they were the ones she needed to find. As the story goes deeper, a rebellion force grows within He Yo's father's gang. And the fire spread to He Yo also.
Anyway, to make it short, in the end, everything was all right except He Yo finally makes a choice to be a normal girl instead of a gangster girl. She decides to give up on power and money and luckily enough she had 4 men who were willing to support her.

From Tinte:
Suh Hyun-bin grew up under the cruel hand of street gangsters, but after her little brother dies, Hyun-bin runs away and is taken in by a rich family to be trained to become a bodyguard. However, she must hide that she is female, and pose as a man. And so, for eight years, she grows up as a cold, male, bodyguard. It looks like she'll be this way forever--until a fateful encounter with Lee Yun-ha shakes her very foundations, and leaves her conflicting with herself, as her feelings of love clash against her feelings of duty.

Being beautiful is never easy, especially if you're an eighteen year old boy like Gene who is constantly mistaken for a girl because of his delicate good looks. Gene is, in fact, anything but delicate. He is the ringleader of a group of tough kids in an all boy's school, and he's quick to beat the living daylights out of anyone who even hints that he resembles a girl.

If that wasn't hard enough for a regular teenage guy to cope with, his life is about to take a shocking turn for the worse. When Gene stumbles upon strange happenings in the forest, he gets sucked into a world of vampire intrigue and sinister romance that he never knew existed. And he learns that there are worse things than being turned into a vampire: being turned into a girl?!

From HMR Scans:
Ever since she was 10 years old Eun Song has been an orphan! Money is the best! If it's for money she would do anything (except for kissing). Stubborn rich guy Jae Gal Won who acts like a gentleman in front of others. But when he sees maid Eun Song he becomes greedy and playful… Is this love?

Lang Lang is a girl who was adopted by rich parents. She starts attending the school of her brother Ian, who is the idol of his school.

A Prince Charming suddenly appears infront of a country girl on a remote island.
"I love you, I want to be happy with you like this forever."
Setting a foot on a strange city to find her Prince Charming, she finds out that he is actually the Entertainment Industry's top star, Gang-Woo Choi. Even after seeing her, he pretends as if he doesn't know her...!!!
"Gang-Woo Choi! You dare play around with me? I'll never forgive you!"

We have dreams from time to time. Dreams of being able to use magic... Magic! If witches were to listen to everyone's wishes, who would listen to the witch's wishes?

Hee-Yul Yoon has just moved back from America to Korea with her sister, Suh Hee Yoon. She is determined to deal with her hard past by leaving behind her aunt, uncle and her friend Ricky Ha. After buying a pack of cigarettes she bumps into a handsome boy. And then all of a sudden he kisses her! Who is this annoying bastard and what's his deal?! You had better believe that our heroine Hee-Yul will get to the bottom of this!
(Source: Lunar Ageha Scans)

The one "who operated a Hong Sin Seo for 10 years", who shudders at the monthly rent, Na Baek Su, dives a 1 million dollar project, The Search for a Princess!

For money she'll do anything! She who says that money, money and more money is the best, Suh Jan Di. To help her uncle, Na Baek Su, she joined the Search for a Princess...

Her princess candidates list shows a couple of people...

Cold, charismatic, the one who'll go down in the history of the fashion world, Yu Jin.
The one who'd even sell the Sameun group for the money crazed girl, Eun Hyuk.
A wingless angel's infinite love, our eternal goddess, fashion model Eh Eun.

A love story that outrageously intertwines the princess candidates and Suh Jan Di, with lots of trouble and excitement!

One girl, Hajin Seo. She tries to wash her past away, a past filled with murder. But she cannot. A teen star, who just happens to be infatuated with her, tries to cheer her up. But the only two that can cheer her up is Mina, the girl she thought she killed, and a black haired boy. Once the leader of many, all three will become fallen ones.
(From Acacia15)

Starting today, I am an elegant lady. ~♥
Jaekyung Lee, referred to as princess by her father, has promised herself to give up fighting and aspires to be the perfect lady. Mastering cooking and sewing, all in order to prepare herself to meet Minwoo, the sunbae of her dreams since middle school. However she oversleeps on her first day starting at SungMoon High, which Minwoo attends, and encounters a group of guys harrassing a girl. What will she do?

Life isn't that great when it's composed of a stubborn sister, single mom, and a dad that left you for someone else? If that's not enough, you meet a dwarf that's part of a famous boy band? Could this get any worse?!
(Source: Within Silence)

Seobang(1) my ass! Who's your hubby,
And who are you calling my manura(2) ?
Promise between households?
Pu! Who cares about that kind of thing!
Oh goodness, our neighbors,
Just listen to the way he's talking.
I'm telling you to keep the promise
Since it's a vow between two households!
It's not as if I've become your manura
Because I wanted to be!!!
Anakne(3) virtues are;
One: Carefulness of conduct, Two: Carefulness of conduct.
This is the way she was taught to act,
Genuine country maiden Kim Seon-Nyeo.
Because of resistance(?) from Cha Eun-Hyeok who is to become her seobangnim(4),
She gives up on trying to be the perfect wife,
And reveals her true nature
As a hot-blooded fighting art specialist!
Taming Jogang Jicheo(5)?
It's actually taming Jogang Jibu(6)!
(1) Hubby
(2) Wifey
(3) All of women
(4) "-nim" makes it to become a formal way of calling seobang(hubby).
(5) Wife who has shared one's hardships
(6) Husband (literal meaning father) who has shared one's hardships
Source: mangaupdates

Mun Su is a strong girl with a weak heart. Wanting to pay off the debt of her uncle, she is going to work for the creditor. To her surprise, the guy she beaten up outside is...!!! (You can guess where this is going.)

"No matter what kinds of challenges I will face, I must overcome it."
The smiling bright girl, Goo Eun Sae. Ever since she was little, she was raised in an orphanage. Because she is the number one student of the entire nation, she was chosen by the chairman of a rich company to help his son be the top ten students of his school. In turn, the chairman will send money to Eun Sae's orphanage to help the kids. No big deal right? However...
"My god! The chairman's son is in 400th place of the entire school?! How can I help him raise up into top ten in only one year?!"
Can the bright girl, Goo Eun Sae do it? For the children's sake she must try her best. But what kind of person is the chairman's son? How many more hardships will Eun Sae face? Will her smiling, innocent face like sunshine shed painful tears? Will love bloom out of this?
(Source: MU)

Joeun remembers everything that turned her life upside down. She remembers the man who helped her out at the darkest of times, who abandoned her while calling her cursed. She remembers her prince, who she had her first kiss with at the age of eight. He, too, abandoned her in one day. She remembers the strange black haired man who beat her mother up. Everyone said that she was cursed, and she wants to prove them wrong. Eight years later, Joeun finds a wallet. She is going to turn it in when her friend is caught by a gangster and lots of money is needed to save her. But the wallet owner sees everything, and decides that Joeun is his next target for revenge. But the wallet owner seems to be a cross-gender freak.
(Source: MangaUpdates)

From A Duck's Paradise:

The prince of heaven is punished after defiling a thousand girls!

Meanwhile, a nine-tailed fox has always wanted to be human. She's waited a thousand years to have a flowery romance on earth. However, when she gets there--surrounded by manic obsessive school-girls, she realizes earth isn't what she's always dreamed of. Especially when there's a boy named "Cha Ga-Un" who ultimately gives heartache to all the girls he meets!

A story about a girl from Paris who went to Basel, Switzerland in order to reunite with her father, brother, and the guy she loves, Zerman. Waiting for Zerman to pick her up from the train station, she accidently hugs San, a handsome, wealthy, and ally to some of the few powerful men.