Spring was never Yungsuu's favourite season, until he met this girl. From the moment he captured her with his camera, he knew he was in love. She, Iyang, was charming (in his eyes), even if in reality, she is a more disgusting, agressive tomboy. Furthermore, he found and peeked at her artbook one day, revealing something that she has a rather shocking hobby that may change his mind (or not)...

The protagonist is your average, everyday, Korean school student. That is, if not for his obsession that aliens live on Earth disguised as humans.
Much to his surprise, he was right, the aliens play a game called "Avatar" where they take human form and live human lives. And because of a glitch he caused in their system, now his very life could be at risk.
Now he needs the protection of an Admin of the "Avatar game" or else he could very well die!
(Source: MU)

Se-Joon and Se-Wa are siblings with a dark, complex relationship. Se-Wa, a girl considered psychotic by others, is attached to her brother... a little too attached. In her eyes, there is only Se-Joon, and no one else. And what of Se-Joon's feelings?

This manhwa contains incest themes.
Read from left to right (the official reading directions is wrong so it is L>R)

A fight between living legends that a tv show hosts. One of the main characters, Lim Duk Kyoo, has to win the prize money to pay for his daughters misdemeanors. He decided to enter the " Fist of Legend " tournament because he wouldn't have earned enough money in the amount of time he needed, to pay for his daughters mishap with his regular job.

When Tae Yeon Im finds out that the idol star that she's adored for ages is currently attending the same school as her identical cousin, Jung-Woo Im, she convinces her cuz to exploit their similitude and switch places, she will dress as him, attend his school and try to get close to her lover boy. And he will dress as her, attend her school and revel in its sea of babes. Or maybe he just likes wearing a skirt? The plan seems flawless until Tae learns of a bully named Ga-Wun Kim who likes to beat up on poor Jung-Woo. Meanwhile, Jung-Woo finds that being a woman might not be as thrilling as it seems. New love story begins when Jung-Woo & Tae Yeon switch back to their own original identity. New characters starts appearing and now the story is focusing about Jung-Woo and his friends. What sort of love story that is going to begin this time? Let's find out.... :)

A mysterious boy named Song Jiang takes part in a revolution of young heroes, who are trying to change the evils in the world and fight against false leaders.

(Source: Spottoon)

Shi, Hwa and Mong are sisters. They have something special: they are triplets. After losing their mother, they are each entrusted to a different family. Thus, Shi lives in New York; Mong in Japan and Hwa remains in Korea. Nine years later Shi comes to find all the three in Korea... What became of their father? And why were they separated?

It was love at first sight. The moment Hee-So’s eyes met Won-Jun’s she knew it was meant to be. Their relationship took off when Hee-So confessed her feelings on national TV, but less than a month later, Won-jun is ready to call it quits without any explanation at all. Hee-So’s had a lot of boyfriends — Won-Jun is number twelve — but being dumped is never easy. She’s not ready to move on to the thirteenth boy just yet. Determined to reunite with Won-Jun, Hee-So’s on a mission to win over her destined love once more.
(Source: Yen Press)

From ilovemanhwa.com:

A HIDDEN WAR AROUND THE SECRET OF SEOUL, THE 600 YEAR OLD CAPITAL OF KOREA. Joo-hee never dreamed he would be investigated in the Presidential Residency by making emergency calls to see the flame from the city center though he felt wrong to know noone else witnessed the flame at school. People from National Fengshui Office said Seoul is in danger, for some people are breaking the seals on the places of bad chi. Indeed, people are killed by unearthly monsters, and not knowing what talent he has, Joo-hee's life is swept to this hidden war.

A bloodstained man stands in front of a terrified girl. He proclaims his love for her and makes this ominous declaration: A year from now, she will either die alone or will be with him forever. Now, rumors abound about the cursed girl that causes any boy who proclaims his love for her to die. Join us to discover the mysteries of Metronome.

From Dan of Population GO:

Heters are humans who have gained superpowers. Each heter has super regenerative abilities and one additional power. Miru is a man who hunts heters, these hunters are known as Closers. It is clear that Miru has a past with heters and will stop at nothing to hunt them down.

The "self bully" Ban has a normal enough life, and where divorced parents aren't that uncommon, her life becomes shadowed in mystery when her mother, Eun-Joo, suddenly brings their "distant relative" Jin-Whan home to live with them. Ban’s mother would always avoid the topic of her family, so who is this strange boy? Are they really relatives? What torturous secrets does her mother's past hold? And what do the sudden strange happens that follow in Jin-Whan's wake mean? Would a better question not be who is he, but what?

Year XXXX, The Age of Chaos, a
dictator meets a vampire who
has awakened from 300 years of
slumber and is hungry for
some tasty blood.

This is actually a collection of short stories. The first one goes like this: Two high school girls are complete enemies, and they both are in their own gangs. They fight each other all the time, and to get even with the other, one girl tries to kidnap the other's boyfriend. But the information her right-hand girl gives her is wrong, and they kidnap some really good-looking guy who is NOT the boyfriend of the other girl. You know what happens. They fall in love. (from entropy scanlations)

In 18th century England, Gabriel, an orphan girl from a fallen noble family befriended a young man named Jeremy, who was rumored to be an illegitimate child of a nobleman. After an incident occurred, Gabriel must impersonate her friend Jeremy, taking his place at an all boys academy for nobles, a place that may seem like heaven to others, but really hides a harshness which she would never have imagined.
(Source: MangaUpdates)

The impossible happens in 15th century Korea.
A princess who was disguised as her dead twin brother by her mother became king. Once her true gender is found out, the female king is sentenced to death by drinking a lethal dose of poison.
This story details the events of that forgotten king's life.
(Source: MU)

The unfamiliar guy who appeared in front of Suh Jaehee, the office worker with a busy life. Remove prejudices against him!

Orginal Webtoon
http://webtoon.daum.net/webtoon/view/MyHome?

Have you ever felt as if you are a protagonist of a fictional story? Then Ori's life could be called a cruel drama: the death of her parents, uncaring guardians, bullying in school, nervousness around people...

But as a matter of fact she is... an invented character in the truest sense of the word! And the author, who decides her future, is already writing a tragic finale! Only, ignorant Ori does not obey his will...

(Source: MU)