From Easy Going Scans:

Once... Humans and Orcs peacefully co-existed, but at some point humans got greedy and started a war claiming the Orcs' territory. The diety-Lord who created all, got angry with the humans' greed and decided to punish them with 3 catastrophes. One of them was the "Dragons", divine creatures blessed with magic capable of doing almost anything. Now the Orcs, with a "Dragon" by their side, seem to have the upper hand. Will humans just sit back and see their land get destroyed? They are too devious for that... Their only good plan at that point is to abduct a "Dragon" to even things up. But how are they going to manage the capture of a being with so much power?

Note:Manhwa adaption roughly covers 2 volumes of the original novel Dark Mage (Novel).

Nan Hui was sent off to the city to live with her mother and her nasty grandmother when she was caught smoking at her country school again. There she rescued the drunk and ungrateful, Gong Myeong from the beatings of five boys. Angry that he did not appreciate her help, she stomped on his arm and ran off…not expecting to meet him again.

Gong Myeong devised a plan with Nan Hui after being heartbroken over losing a girl he loves to his half-brother, Baek Jae Ha.

"We're not going to really love each other. We'll be a contract couple to get what we both want.”
The handsome bad boy, Cha Gong Myeong & bad girl, Lee Nan Hui are declared a couple of horror!

What will happen when Nan Hui's best friend, who is in love with her, comes to Seoul? Things get even more complicated when Gong Myeong's half-brother falls for Nan Hui.

Can this bad prince give this bad Cinderella her glass slipper? Will love blossom between these two bad personalities?

It all starts when she was 8. He was kind, and nice to her. Yeo Jin is now 17 years old, and she moved back from Busan to Seoul to meet her first love... but when she arrives he has completely changed...

Hae Na a young pretty famous model who made it to the top within a short period of time.There’s more to this girl that seems pretty mysterious. Her whereabouts are unknown. Except nobody knows her secret, behind those thick glasses Kang Hae Na, a seventeen year old orphan girl is really Hae Na. With her determination to have a peaceful school life, she was allowed to go to school if she can hide her true identity. Find out if she can hide her identity behind those glasses or will her efforts be futile?

From SCX-Scans:

Angela wakes up in an abandoned warehouse. Confused and dazed, she has no memory of her past or any concrete idea about how she got there. Through a series of seemingly inconceivable events, Angela learns that she has been chosen as the next vessel for the great demon queen. The only thing preventing the queen from taking over her mind and body is her virginity. Will Angela be able to avoid temptation or will the Demon Queen Lilion be unleashed to ravish the Earth?

This series has been on hold many times, and now the author has decided to stick to volumes instead of serializing. From Tokyopop: Welcome to Faeries' Landing, a place where the real world and the faerie realm collide. Sixteen-year-old Ryang doesn't realize that supernatural beings descend on his town at night, but when he stumbles on a group of faeries bathing, he ends up becoming guardian of Fanta, a grounded--and very fetching--faerie. Having an otherworldly babe hanging on you 24-7 doesn't sound so bad at first... but when Fanta’s rival curses Ryang, he is destined to encounter 108 doomed relationships...

From Sura's Place:
Cha Ji-Yyoung is a journalist who makes a terrible mistake and is forced to make amends for his fault. He is forced to crossdress and enter a woman's university to reveal corruptions. His interesting life as a 22-year-old female dancing student begins.

A young man finds and returns a lost wallet and cell phone to a beautiful young lady, thus begins the destined relationship between two strangers. Sound typical? Well then, how about making the young lady the young man’s future homeroom teacher, and give them both a twisted sense of right and wrong. And just for kicks, let’s have the young man help himself to a self proclaimed reward from the lost wallet before returning it… but of course, this scenario wouldn’t be complete unless the young lady was very unforgiving when it came to teaching one of her students a lesson on morals. (Source: Infinity Studios)

'S' is a known as a bully caretaker, who avenges her bullied clients -- for a price, of course.

However, in reality, 'S' is a nerd named Kang Song Ih, with a twin brother named Kang Ah Eul, whom she loves above anything. Ah Eul attends Chungha High School, a famous and expensive school, but over winter break, he attempts to commit suicide. Song Ih, determined to understand why her brother tried to kill himself, attends Chungha High School, pretending to be Ah Eul -- uncovering the reasons why Ah Eul was driven to suicide, including one mysteriously handsome but "bad" guy named Suh Ga Yoon.

Read as you follow her life while staying in an All-Boy's school and living in a dorm -- with a male roommate, who happens to be a famous singer and someone she as "S" had once nearly beat up.

Watch out! Whoever bothers "S"'s brother, prepare to face her!

From HMR Scans: No matter where you are I can recognize you at one glance whether you are disguised or far away. Because it's our fate and destiny. There is no other enemy like you!! You tackle and bother me on everything I do. Say and Yong-won are like enemies ready to attack-!! Messed up and tangled Say’s and Yong-won’s sad but beautiful love story~

From Azure:
Nanhi Hong is the second child in the Hong family. She has an older brother, who is the jjang (boss) of his school, and a younger brother, who is a member of the rival school's gang. When Nanhi meets a mysterious student, things begin to get complicated. What will Nanhi do?

"If you were a girl, we would never have met."
"Well- to...to be honest with you- I AM a girl-"
Plain when she is a girl, but HOT when she is a guy.
Choi Ida wants no more then to relieve her stress and anger when she is off work as the alternative identity Yodah, due to the pressure of being Mimi's slave at both school and home.
One day in the park, free from Mimi, she meets Kang Naru, who kisses her as Ida, not as Yodah (her male self).
Despite thinking that Yodah is a guy, Naru falls in love with her.
But when Mimi finds out about Ida's secret identity, she threatens to tell Naru if Ida doesn't break up with the flower boy. What will she do when both of her lives are at risk?

One day, suddenly... a night where the moon shines like never before, a boy meets the otherworldly Serin, a denizen of Chaos, only to die and become the undead. Now immortal, he can no longer exist with humans due to an ancient law... A tale of revelations that begins as he returns to Chaos, the start of a new adventure!

What is a sweet, soft-spoken girl (Ha Li Kang) to do when her brothers, having just learned fencing and martial arts, decide to test some moves out on her in order to "tame her" and make her into their "little slave?" She runs to her knightly friend (Te Hu Kang, not related to Ha Li) for protection, of course. However, what happens when, instead of comforting her, he tells her that she is a coward for running away like a puppy who needs constant protection? No, she does not break down and cry like a weak girl. Instead, she resolves to grow stronger. With rigorous training everyday, Ha Li goes from being a scared girl who cries for help to becoming the Jjang (boss of a gang) of the Doberman gang. However, events lead to Ha Li getting in an accident with a truck. Afterwards, she is reborn into the body of a beautiful, but weak, rich girl Aram Han.

At her new school, everyone is surprised at the sudden change they see in Aram, who has gone from a gloomy, good student to a rude, carefree troublemaker. Many people bully her. When Ha Li finds out that it is all due to Sin Uoo Park, the handsome prince and Jjang of the school who detests Aram, she decides to have a duel with him for the position of Jjang. What will happen next is for you to find out in this romantic comedy Korean manhwa.

From: Easy Going Scans

Fantasy Action Legend that follows brother's diary!!
After his brother Loki's death, on Tyr's 17th birthday.... Loki's diary is delivered to Tyr. When following the diary step by step, Tyr realizes that everything that's happening around him is already recorded within the diary.

From RC-SCANS:

Gook Eun-Song is your average high school girl... that is until her attractive younger sister stole the man she had a crush on. Depressed, Eun-Song purchased a bottle of alcohol and crawled into a supposedly cursed closet in her father's furniture store.
Yu Ha is your average typical bad boy. Going insane over one article in magazine, he even broke traffic regulations while drunk just to end up being chased by a couple of police officers.

Oddly enough, he also ended up in the same closet where Eun-Song is asleep from drinking too much. Yu Ha ends up sleeping in the cursed closet with Eun-Song by his side... just to find out the next day, their bodies have been switched!

Can anything else possibly go wrong for our poor heroine?

STYLISH ACTION FROM THE AUTHOR OF ARCHLORD! The new English teacher, Chun-Woo, is not your ordinary teacher. Shioon, a victim of constant bullying, unexpectedly witnesses Chun-Woo's fighting power, and begs him to make him his disciple. Chun-Woo claims he can teach Shioon only if he is truly determined, and Shioon must jump off a bridge into a deep river in order to prove it! It turns out, however, that Chun-Woo and his powers are more than meets the eye. Shioon makes a grand entrance into the hidden world of martial arts, and he is about to be taught by the best there is! You can read part 2: The Breaker - New Waves here.

Manhwa you may like:
+ The Gamer - ​THE 게이머
+ Gosu 고수
+ Yongbi The Invincible 용비불패

The story set in the contemporary South Korea. Some 30 years ago, unidentified creatures appeared out of nowhere and have attacked people. They have caused massive destruction wherever they go. The monsters are called "Trouble"s, and get the world have fallen into chaos. Along with the first appearance of the "Trouble"s, some number of humans were born with or acquired supernatural abilities. These mutants called "Trace"s are the only ones who can fight the "Trouble"s. The "Trace" are also considered freaks and generally shunned by the community because some of them misused the powers for their own interest. The plot revolves around two main characters. Sa Ghang-Gwon, a high school student born as a "Trace" who attempts to hide his ability. The other is Kim Yun-Sung, who acquired his "Trace" abilities during his early 30's. Webtoon from Daum

A cynical romance, 'Have you been addicted to love?'