That gloomy girl is so beautiful! Let's aim for it! A school romance comedy together with that reserved, cute girl as we try to stop being loners!

Hyeonseok Choi finally becomes the undisputed heavyweight MMA champion of the world, but gets hit by a truck, and dies.

A fairy, Rahel, appears and convinces him to fight as a hero in the afterlife, but accidentally sends him to the side of the demons.

Stuck in the demon world, he sweet talks his way into positions of power, but slowly discovers this battle between good and evil isn't as clearcut as it seems.

"I can see your number. The number of people you will kill in the future."

If he kills before they kill, the murder will not occur. Serial killer Number punishes the 'Destined Murderers' one at a time under that resolution. Could his wish to create a world without murder through murder ever be accomplished?

When the Devil King announces his retirement, he calls forth his two sons, Yomi and Sora, to give them each a quest. Whichever of them finds a pure Yamato maiden within a year would inherit the throne of the Devil King, while the other would die. Thus begins Sora's sex-fuelled adventure to find a woman that can satisfy his father...
(Sakigake!! Otokojuku Wiki)

Ghislain Perdium, the Mercenary King and one of the continent's top seven, started a great war in an attempt to avenge his fallen family.

His plans of revenge were going smoothly until he was slain by Idun, who he had never expected to make an appearance. Ghislain thought he died, but he woke up as a younger version of himself from before the fall of his household.

With this second chance, he decided to fix all the wrong pieces of the puzzle and avoid making the same mistakes he did in his past life!

Elric Melvinger.
The sole heir of the prestigious magic family.
Though he possessed innate talent, he had too much talent, and as such, could not learn magic. However, he then received a blessing left by his ancestors!

[Eat demons.]
[Swallow demons.]
[Drink demons.]

[Continue to keep accumulating demons within yourself, and achieve new magic!]

Reach high.

Reach a height so high that no one will ever reach me.

In middle school, Konoha Satou dreamed of escaping into a world like that of Dark History, a romantic fantasy novel she wrote telling the story of the count's daughter Konoha Magnolia and the knight she falls in love with. Years later, her mother rediscovers that novel - only for Konoha to get hit in a traffic accident and die!

When she opens her eyes, she finds herself in the world of her own creation as the heroine's younger sister, Iana Magnolia. Somehow, she's been reborn as the character she created to be the greatest villainess of all time?!

Ghost-seeing School Boys oneshot included in volume 1 as chapter 3.5

If you're reincarnated in another world, you will be naked and alone in the forest. The only things you can rely on without magic or cheats is your wits and fists!

Author's Twitter: @yazin_uhouho: https://twitter.com/yazin_uhouho
Web Novel Raw: https://ncode.syosetu.com/n5771ei/
Alternate Raw: NicoNico: http://seiga.nicovideo.jp/comic/41841

A Twitter series about a handsome salaryman and an unapproachable office lady who dress completely different when they are off work.

Asakusa Midori wants to create an anime, but she's too disheartened to make that first step by herself. But by pure chance, she meets Mizusaki Tsubame, an up-and-coming socialite secretly dreaming of becoming an animator. Together with Midori's money-loving best friend Kanamori Sayaka, the energetic trio slowly work towards making their "ultimate world" a reality!

For as long as he remembers, Komi has been shorter than his fellow classmates. He always felt inferior as a result, until he met Obinata - a girl who is head and shoulders above him.

Yes, Asumi Obinata is tall. She’s imposing. But she’s also Komi Amane’s girlfriend. And these two are the happiest kids in the world.

The super-popular oneshot has been expanded to a full series here!

Dogged by pain and misfortune from the very beginning, Shin-Ae decides she wants nothing to do with people nor anything to do with romance. Although content with her unsocial, boring, loveless existence, her lifestyle is challenged after she ruins an unsuspecting strangers' clothes.

One day Kang Songhyun opened his eyes on the Azul Continent.
He didn’t know the reason.
When he woke up he was no more in South Korea.
He’s thrown into a fantasy world.
‘Why did I come to this kind of place?’

At that time, the status window pops up in front of him
[Your job is ‘healer’?]

But among his skills…
‘huh? …No healing?’
That was the beginning of the life of an unlicensed healer. A healer who does not know how to heal.

Kang Songhyun is good at everything except healing
In a fantasy world as an unlicensed healer his story of survival begins.

After a prophetic dream foretells her sister’s death in a political marriage, Arasilla Hugo takes matters into her own hands and marries in her place. Her groom? Demian Vandermeer, the knights’ captain and the brother of her sister’s former betrothed. The only problem is that mages and knights are sworn enemies, and their sharp tongues and stubborn hearts turn every situation into a competition. Arasilla races to save her sister from a tragic fate, while Demian fights for the dukedom. Will their rivalry stay just that? Or will their contractual marriage burn into something more?

I, a corporate slave, transmigrated into a game as a noble. But I'm just an extra that will die at the hands of the villains in the future? No way. I'll somehow reform them and live a lavish life! For this I started sponsoring the future villains to prevent them from turning evil and helped them overcome their difficult circumstances. As a result, they all grew up to be upstanding and ordinary, enough to make me feel proud. And so, I became the ultimate mastermind of the kingdom... Huh?

The first unique romantic comedy manga in the history of CoroCoro! The slime he created transformed into a girl!? Kotarou, a young boy, is constantly pushed around by Puniru's freewheeling behavior. It's a fun and exciting daily life!

“The Hero defeated the Demon King in the war of men against demons…” Those kinds of stories are a thing of the past. Nowadays, adventurers, demons, Heroes, Demon Kings, and so on are all occupations that no longer involve putting one’s life on the line. Peace has returned to the world, and dungeon exploration has now become a form of entertainment. Adventurers and monsters now all fight using clones they’ve created with magic in an extremely popular form of dungeon clearing where nobody dies. The footage of the dungeon getting cleared gets broadcasted all across the continent, and I’m a member of a Hero’s party that was ranked the 4th most popular in the world… but not anymore. Parties had a limitation of 5 members, and I was told that an unpopular job like Black Sorcerer would only get in the way of getting to 3rd place or beyond.

Now that I became unemployed, I was forced to find another party but I just couldn’t find one. One day, I encountered a beautiful blonde red-eyed woman who told me she had a job for me. After being so touched from having someone recognize my abilities far more than my past comrades, I ended up agreeing to take an interview without asking for the details. When I arrived at my destination, I was at the world’s hardest dungeon where no party has ever reached the final area, the Demon King Castle, where the Big Four and the Demon King were waiting for me. This is the story of a Black Sorcerer that was kicked out of a Hero’s party and joined the side of the Demon King Army to repel the Heroes. (Source: Novelupdates)

Or
Please read the title again.

Artist's Twitter (NSFW): https://twitter.com/kana_kkn
Orignal webnovel: https://ncode.syosetu.com/n4836fm/

The infamous leader of the assassins known as the Shadows, Raon, had lived his entire life as a dog on a leash.

However, through a twist of fate, he obtained a new life—as the grandson of Glenn Zieghart, the Destructive King of the North!

He prepares to use the Ring of Fire he still possesses as an infant to begin cultivating when he's diagnosed with the Curse of Frost.

With the odds stacked against him, will he be able to finally stand on his own feet and live life by his own will, to become the strongest swordsman on the continent?

“I will slay anyone standing in my way of revenge…
even if it is a god.”

This talks about Rimuru and his friends spending their free time doing something fun together. A spin-off from the main series "That Time I Got Reincarnated as a Slime"

After half a year on the run, the vampire Eugene was ultimately killed, offered up as a sacrifice to boost a holy knight’s fame.

Just as his life ended in bitter regret, a chance to return came to him.

“I will never die like that again. If I’ve truly returned to the past, then I’ll never regret anything a second time… no matter what it may take.”