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?'

From Tasty Kiwi Scans:

HyoYi is a poor girl with a scholarship to one of the most exclusive private schools, attended only by kids from the richest families. Strong and resilient, HyoYi fights to protect her mentally handicapped brother whose disability makes him a target for bullies and beatings. Then she meets MinHa, who unexpectedly winds up making an agreement to protect the siblings. Bound together by their unusual arrangement, HyoYi and MinHa gradually learn what it means to love, one step at a time....

From Esthétique:

Lee Han-Ah used to be bullied in 2nd grade for having a “wide and flat” butt by a boy in her primary school and has hated him ever since. Now, in high school she is the celebrated, legendary captain of Il-Hwa Girls High School and she is seeking out a pretty boyfriend. Then she meets the mellow and seemingly perfect boy, Yoo-Min.

Dr Kim works at the Korean equivalent of NASA. He has talent, brains and is unparalleled with his programming skills.

One day, he hacks into the Mars Rover and catches the glimpse of an alien. Unfortunately, the device wasn't recording at the time and so he has no proof and clearly no one believes him. And as fate may have it, that alien has come to Earth believing she had been caught on video and wanting nothing more than delete that proof before her boss finds out.

Misunderstandings ensures as the two characters meet and are forced to work together as a new group of aliens start stirring trouble on Earth.

From Esthétique:
Boy-crazy Jae Yoo is willing to go through any underhanded means if it means living in the boarding house full of hot guys… Even if it’s going out on a blind date with the dorkiest boy in the school. When she dumps the guy immediately after, she pisses off his handsome best friend Ji Hu and from that point on, the two are constantly going at each other’s throats like cats and dogs. When Jae Yoo finally accomplishes her dream of entering the “boarding house of hunks,” she thinks that nothing could go wrong. An amazing house, a kind landlady, and even a cute guy who seems to be interested in her… What’s this?! Ji Hu is the landlady’s son?! And how is it that he knows about Jae Yoo’s most embarrassing moment in life? What kind of life will the two lead under the same roof? Will they be able to live together at all?!

Shik-nam is a student that's obsessed with his grades and studying, so much so that, for him, solving problems and equations can reach erotic levels. Needless to say, his interest in anything other than his studies is near zero.

Then comes a complication. The animal kingdom is furious with what the world has become, so they sent Yegrinna, the dog princess, to punish the sinful humans for dirtying the world by turning them into animals. And out of all the places she appears, it's at our unfortunate protagonist's room.

What awaits Shik-nam and Yegrinna now that their fateful meeting has set into motion plans long since in wait?

Tough, lazy, money lover, yet beautiful high school student named Shin Bia. While she's thinking about the eras she suddenly falls into that ancient time period! She had to transform into an elegant lady and while she's there she faces quite an obstacle.

Seung Hun is a handsome playboy who's never experienced true love. Woo Sun is a charming playgirl who wants to be loved for herself and not her beauty.

Jong Yi is the beautiful, mysteriously childlike and vacant boy who becomes the object of their affections. A complex love triangle evolves between these three, further complicated by the involvement of Jong Yi's unfailingly devoted childhood friend and first love, a girl named Yu Ri.

They're all soon to discover that love is a long, painful path...especially if the object of it is completely oblivious to your attentions!

Note: As indicated by the genre tags, there are both shounen-ai and romance pairings in this story. It is not F/M romance only.

Roa Coatl is on a mission. He must find the descendant of Quetzalcoatl to make her his wife and continue his great race of dragons for 'that day'. However, with no knowledge about love and having no interest in women, will he be able to accomplish his task in the human world?

From Evil Flowers:

Shin Soon-Ae has the perfect boyfriend in the eyes of her peers. He’s handsome, is in a band and loves her. One problem though- she doesn’t love him. One day, a boy appears and wants to board with her family as a student, and Shin Soon-Ae finds herself attracted to the boarding student. To complicate things, the boarding student seems to have strange mysteries of his own.

BACKGROUND: Dulcinea is a reference to Don Quixote, a Spanish novel about a man who is in love with a woman, Dulcinea. It also happens to be the name of the band Shin Soon-Ae’s boyfriend is a part of.

The protagonist is sucked in to a weird whirlpool in a river and somehow ends up in a island in another world with native elves that wear leaf clothes, have the knowledge of an new born, and have sex like rabbits. That also have a body as weak as butter.
He decides to become the king of the place and rule with an iron fist and teach the naive elves cruelty, evil and watch as they kill each other.

Jung Yoon-hwan may be an orphan but he was a college student who was focusing hard on his studies, one day he is brought to a mysterious "White room" to fight even when he does not want to. Every time he defeats these monsters he gains psychic power, magic, and items beyond his imaginations....

(Source: Game of Scanlation)