What makes a 'proper adult'? Inspired by the words of his late father, Yutaro Urashima sought to become an upstanding member of society by developing and strictly adhering to his own "Articles of Adulthood." Little did he know, however, that those same articles would go on to dramatically change the world...

On a harsh rainy day, a high school student without any particular special skills, Usato Ken got dragged into another world summoning with two others; a good-looking guy and a beautiful girl, both of whom he strangely started getting along with just today. As an especially talent-less individual that doesn’t stand out he internally thought that he would be treated as useless. However, the others were unexpectedly kind.

Usato who found hope in another world thought that, but the reality was different. He had a certain magical talent hidden in him and he was forced to fall into hell in the name of “training.”

A super-class dragoon group-Cyril, a boy who was banished from the S-class guild "Lindworm" for some reason. What he had hidden was ... the ability to "talk" with the dragons, which was unconventional!
Cyril who met unique dragons and launched his own guild. Perhaps because of its extraordinary qualities, the level of the guild soars at the fastest rate in history! Cyril, whose arm was recognized, will make a name for himself as a non-standard dragon knight.

Sakra, the last surviving princess of a fallen kingdom, is being hunted down for the power of Ambrosia she possesses - the ability to grant divine strength, but only to a human. With no human companion, she decides to summon one from another world in a desperate attempt to find a knight to protect her, but the man who answers her call is less than what she had hoped for.

Seonghyeon Han is a victim of a violent crime that left him with impaired legs and a fear of the outside world. Now, he faces an even greater challenge: while he gained the power to create clones, he has just 24 hours before being sent to another dimension.

As the countdown ticks down, Seonghyeon makes a desperate move -- he sends his clone through the interdimensional portal, and discovers his real body can remain safe at home.

Thus begins the epic tale of Seonghyeon's... clones.

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)

From Exertus Scans:
Millions of years have passed since the times of legends, when the worlds of man and gods were still the same. In these times it was the desires of man that moved the world. It is the era of the 500 year war: The warring states period. Kingdom is the story of a young boy named Shin who grew into a great general and all the trials and bloodshed that lead him there.

Note: Kingdom won the grand prize for the Tezuka Osamu Cultural Prize in 2013.
The manga also earned a Guinness World Record on December 12, 2012 for Manga written by the most people. The record was due to its "Social Kingdom" campaign in which fans and other artists were given the task of redrawing the entire 26th volume.

17-year-old Iguchi Tatsuya has just been released from juvenile detention and is on probation. He's been relocated to a new area, away from the bad influence of his old friends, and is under the care of his aunt. He is determined not to be sent back to lockup, and he works hard in his aunt's restaurant. However, he still has the same personality, the same tendency to violence, and still falls in with the same sort of people. It's going to be difficult for him to stay out of trouble

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.

One day Mami realizes that she has magical powers. Her mother also had those powers, as well as her grandmother. Mami slowly has to learn to live with her abilities, and she gets into a lot of trouble.

Every time she opens her mouth, it's nothing but abusive language, and her problematic behavior never stops. The protagonist has had enough and sets a “plan” into motion…??!

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?

May I never be born again
Trying to throw yourself off the roof of the school
A boy, Ayumu, who lived an ordinary junior high school until half a year ago.
What pushed him to this point? And what is the true ending that awaits...?

As a child, I fell into a strange dimension in a dream.
In my dream, I was an adult, dressed in clothes I’d never seen before and wearing a ‘mask’.
‘Now, it’s time to roll the dice.’
And so the dream game that began with the roll of the dice, the ‘World of Eternity’, became my destiny and my life, perhaps even my world itself.
As I rolled the dice with mysterious, nameless people, I was happy and joyous.
Until I became a piece on the board myself.

Diablo Volfir, a mighty magician, was sealed for aeons due to the schemes of the 12 Gods, but 66666 years have passed since then, and he descends to earth once again!

When there is no way out, the way is in.

Doomed to die next month, our terminally ill protagonist Chan is too frail and defeated to try anything at all.

No wonder he chooses to plunge himself into an RPG world he is only too familiar with.

Why should this run be any different?

Well, other than the fact that he will wake up inside the game and get struck with an existential epiphany that will make him fight tooth and nail to give Nox, his equally ill-fated RPG persona, a better chance?

Maybe, it’s not over until it’s over.

I've become the Demon Lord, the final boss in a game, but...

If I invade the human world? I'll be slain by the max-level protagonist I raised.

If I stop the invasion? I'll be devoured by my starving demon generals.

...Therefore, the only answer is farming.

Usami is a beautiful classmate with good morals and top grades. At school, she views Sakuto as her rival. But when he bumps into her after school, he sees a different side of her. She was playing at an arcade after classes, and she had this innocent smile that one couldn't imagine on her at school.

For the sake of getting along with her, he gets close to her at school and then plays together with her after school. They each have their places where they can deepen their bonds, and at last...

This is the start of a heart-warming love triangle romcom!

Several decades have passed since the Hero defeated the Demon King and brought peace to the world, and the Hero has grown old enough to only vaguely remember his magic spells. When the remnants of the Demon King's army attack the Hero, he decides to set out on a journey again. This time, it's not a journey to save the world, but a "death preparation journey" to look back on his life.

On the way home, Jin and his friend Komachi are suddenly transported to another world full of strange creatures and Jin is killed by them, but somehow manages to come back to life, but as a tentacled creature !? This is the start of a dark tentacle fantasy!