Han Jee-Han, a normal high school student, suddenly develops a special power where his entire world is shifted into a game-like setting. He can see the power levels of people, look at the stats of a seemingly normal item, get abilities, and even level up! Follow Han Jee-Han as he discovers how to use this power, and maybe even where it came from.

Description from Line Webtoon:
What if your life is just like playing a game? What if you can upgrade your status and gain more levels? A fantasy world is coming right at you!

From: Easy Going Scans
Six minors (16 - 17 years) answering to the nicknames of Joe, Mario, Suppon, Baremoto, Heitai, and Kyabetsu are put into a reformatory for offenses such as aggravated assault, swindling, flight, etc.
Their stay in hell begins immediately. Accommodated by a doctor pedophile, they are placed under the watch of a despotic and brutal crew. Cellmates with a certain Sakuragi (called Anchan), the tension rises between the band of buddies and their new "friend."
A brawl breaks out, and our six prisoners are done rossés by the mysterious young man, thanks to his boxing talent. The story will not only follow the lives of these seven characters surviving in their hellish environment, but also their disillusions due to the rejection by the outside world and by their close relations. This is about the extraodinary and invincible friendships between these young men.

Note: Won the 2005 Shogakukan Manga Award for the seinen/general category along with A Spirit of the Sun.

From Easy Going Scans:

Asuma Eiji has the gift of psychometric power, meaning he can touch people or objects and see their history in images and words. Most of the time, Eiji is just a delinquent high school kid who hangs out with his friends and neglects his schoolwork. However, his psychic abilities have brought him to the attention of police inspector Shima Ryoko, who often calls him in to help out with difficult cases.

Currently, there's a serial killer loose in the city who has just claimed his sixth victim. He kills young women, contorts their bodies into odd shapes, and uses spray paint on them. With Eiji's psychic help, will Ryoko be able to catch the murderer?

This is a sequel of Psychometrer Eiji.

Hyun-Su Jung (29) was scammed by Jung-Mi Kim and is now in debt of 900,000$. He is being chased by loan sharks and ended up kidnapping Jung-Mi Kim's daughter, Ha-Yeon Lee (17). But when Hyun-Su Jung calls to demand ransom, Jung-Mi Kim tells him she doesn't care about what happens to her daughter and hangs up. What will happen to the kidnapper and his victim?

From Easy Going Scans
On his right, his index finger on a trigger. On his left, a wedding ring. That is Tokichi's new life. A shy and clumsy salaryman, forced to become a hitman overnight. A double life: bowing during the day and gunfighting at night.
He also has to juggle the two women in his life: his domineering wife and the jealous girlfriend he has inherited as his secret persona.

From: Easy Going Scans

Some corrupted high ranked officers within the palace are accusing the crown prince Sado of high treason and ask for his death! What will the Emperor do to save his son?

A fusion heroic historical about a crown prince in a wooden chest about to meet death, but actually turns out he has bigger influence and authority beyond imagination.

Adapted to K-Drama.

From Easy Going Scans:

Lin Xiaoyou, childhood friend of Xi Yu, died at the age of 14, but her spirit refused to pass onto the afterlife. Instead, she stuck around and became Yu's "guardian angel" due to a promise she made to him. Under Xiaoyou's constant guarding, Yu hasn't had a single girlfriend even though he's already 24. Being in a proper relationship has become his goal in life, but such a simple wish brings about a series of terrifying incidents. Is Xiaoyou really a "guardian angel", or is she actually an "evil spirit"?!

For four decades, Golgo 13 has been the world's greatest assassin for hire. Sometimes to settle a private score, and sometimes to change history!

His real name and nationality are unknown but his legend is everywhere. Golgo 13 never fails a job and never sees his clients again. Unless they try to betray him.

Note: Won the 21st Shogakukan Manga Award for general manga in 1976.
Is the bestselling seinen manga as of 2016 with 200 million volumes sold.

Shikada Kokonotsu's father owns a rural sweets shop, and his plan is for Kokonotsu to take it over one day. However, Kokonotsu wants to be a manga author instead! One day in summer, the cute but weird girl Shidare Hotaru, from the famous sweets company, comes to pay a visit. Apparently, Kokonotsu's father is famous and she wants him to join her family's company. However, he will only agree if she can convince Kokonotsu to take over the family business!

From: Easy Going Scans

DoAh Lee, a seemingly "normal" high-school boy, gets caught in a strange and embarrassing situation. Before he knows it, he is blackmailed into becoming the manager for a team of quirky, unruly, not to mention slightly lazy, heroes. Will he ever go back to his "normal" high-school days?

Asta and Yuno were abandoned together as babies in baskets at the same church on the same day, and have been inseparable since. As children, they promised that they would compete against each other to see who would become the next Wizard King. However, as they grew up, some differences between them became plain - Yuno was a magical prodigy, while Asta could not use magic at all. In a country where magic is everything and athletic ability is nothing, Asta tried every day to provoke even the simplest magic out of himself with physical training and loud proclamations of his will.

At age 15, during the group ceremony where three-leaf-clover grimoires of different designs float down to each person, Yuno receives a spectacular book with the legendary four-leaf clover, while Asta receives nothing at all. Later, however, when Yuno was surprised and trapped by a fallen magic knight, the truth about Asta's power and determination was revealed—a dark-covered, obscurely patterned grimoire broke out of the ceremony tower and came before him! This "black clover" book of anti-magic had a five-leaf clover on the cover, even though Asta himself did not see it as it lit up briefly just that one time while he defended his friend.

Now the two friends, the four-leaf-clover genius and the no-talent with the hidden black clover, are heading out in the world, competing for the same goal...

From Easy Going Scans:

Sui and Sou are a pair of twins who are starting high school. Though raised by occultist parents, they were supposed to have a very normal high school life. However, once they arrived at campus they not only encountered werewolves but also vampires and even sorcerers! As more strange people appear one by one, will the twins' secret be uncovered?

From Easy Going Scans:

Legna, one of the last members of a dying-out clan of dream-seers known as 'Oracles', serves as a courtier of the childlike and (apparently) well-loved king of his country.

One night, he has a prophetic dream of impending danger towards His Majesty - but is unable to discern the source of the threat. Determined to protect the young royal, Legna then begins an investigation which takes him deep into the realm where dreams and political conspiracies intertwine...

From: Easy Going Scans

In a world where only females are born with the ability to practice magic, Amel, a boy is born with the ability. In this world, he must conceal he is a male or he will be considered illegal. From the prestigious Espresso family, he/she must prove that only he/she is needed to capture the illicit escapees.

This manga based on the ever popular AKB48 group.

Yoshinaga Hiroko loves AKB48. Urayama loves her, but doesn't think much of AKB48.

Urayama Minoru has a pretty face even compared to girls. After his friends planted the idea that Hiroko was going on a date, he follows Hiroko to an AKB48 concert. There, Minoru finds himself backstage with a pass he found on the ground and then in several lucky pervert situations with many of the AKB star members. After being chased and accused a pervert, his impression of them only worsens. But when he gets to the audience seats and the concert starts, he was dumbfounded: Were they really the same girls he met before? Hiroko spots Minoru. He learns she was not on a date, just in love with the group. There, Hiroko confides in him she's always wanted to shine bright on a stage like them. Although she is not confident in herself, yet can't help but wanting to try. She resolves that her next audition will be her final one and then she'll give up.

Then Minoru decides he will help her in the audition any way he can, even if it means he has to participate too...as a girl.

As Urakawa Minori, he helps Hiroko pass the audition, but inadvertently passes as well. Thus, Hiroko and Minoru's road as idols of AKB48 begins...

In a city that is neither small nor big, there's a mountain that people avoid. The undeveloped mountain isn't protected with a green belt nor is it a site of environmental conservation. The avoided, prohibited forest... With the dismal atmosphere and the rumors that whisper about the spirits, let it to be called Spirit Mountain.
On the mountain there's a house, a famed house of mediums that shows off their long glorious history of their heritage. Hence, it was once called Medium Mountain.
But once, a long time ago, they said a Ninetails lived there... And was known as the Fox Mountain.
But now, 20 years later, a dark aura covered this isolated place...

A foxy temptress. A strange misty tree demon. A girl with the power of the goddess Xianjia! Being caught between these women is a feat in it of itself, but our hero Feng Xi must fight in order to protect the peace and save the world!

On the way home from work on Christmas Eve, 26-year-old blue-collar worker Yamada stumbles upon a drunk and crying high school boy and takes him in for the night. This boy, Chihiro, is polite, a good housekeeper, and lives quite close by, so he ends up coming over to Yamada's place from time-to-time to cook for him as thanks for the rescue. Yamada finds out later that the reason Chihiro was so miserable on the day they first met is because he was mulling over being in love with his best friend...

From Easy Going Scans:

In the near future, Mother Nature has decided to fight back against all human encroachment.

The world has entered your standard apocalyptic scenario that you can find in many forms of fiction, but it's right in the middle of the apocalypse actually happening, rather than in the aftermath. Vines and foliage entangle cities, as large wooden mech-like creatures called Arethusa (named after one of the mythical Greek Hesperides that tended the gardens in a remote corner of the world) rampage through cities.

Souma Shin, a punk kid out of Japan, went to visit his brother Ken, but all hell breaks loose as Shin finds a group of small kids being used for military purposes. He tries to save them in the confusion created by an Arethusa invading the compound...

The mafia boss of the Iwashi family is a high school girl named Konomi Minoko. But don’t let her appearance fool you; she has done and seen things normal citizens can’t even imagine. Under her control are two assassins who have gained legendary status for their deadliness and ability to get any job done. Ishikawa Rushia, codenamed Baret, uses a modified handgun that uses a custom made hollow point bullet that explodes the target from the inside. Shirato Marin, codenamed Francesca, uses a original weapon that is a mix between a throwing axe and battle axe. Both of them are Minoko’s high school classmates and seem like normal teenagers but are two of the most feared killers in the mob world who handle missions often involving other assassins and underground groups.