Aang, the strongest human warrior on the verge of death, has inexplicably travelled 60 years into the past, with the double-edged sword of the “strongest demon” power hidden inside him. “The only way to escape the fate of the pastis to evolve. Aang: “Don’t let yourself be a slave to your limits, break free and become a demon that reigns!

Like in the famous Osamu Dazai's book "No Longer Human"/ "Disqualified From Being Human" (Ningen Shikkaku) , the protagonist of this story attempts a double suicide with his lover... except he gets hit by a truck and summoned to another world instead.
Now he wants to find his lover, so he can commit suicide with her.

Shinonome Karin is a very unlucky girl. Very. After a terrible morning she is late to her first day at a new school but everything ends with a very strange gamble... When all seemed lost she is saved by her history teacher... That also hates gambling!

Without possessing the unique skill blessed by the goddess, a boy named Kujou Kyouya failed to save the world. He was ridiculed as a “failed hero” at the interdimensional-level academy where returned heroes who had saved many worlds gathered. However, he became the strongest and most unique hero, having trained for 30,000 years in another world with the most evil demon king, Felice, who has destroyed 3,000 worlds! Now Kyouya’s unique skill is so powerful that he cannot even be defeated by the strongest heroes! The legend of a boy trained by the most evil demon king, begins!

With the only thing she inherited from her parents being their once-great family name, the poverty-stricken Reiko Kujouin jumped at the chance for a scholarship to attend a prestigious school known called Meisei Private Academy. Why? Because of the ¥50,000 per month allowance and all her school supplies being paid for, of course!

But little could she expect that, on her very first day of classes, she would be tackled from behind by another girl who, convinced that she's been reincarnated into the world of an otome game, accuses Reiko of being a wealthy villainess...!

Deep within the most infamous dungeon, the 'Primordial Core', lives the worst boss monster of all time. Its the story of the struggle of a boss monster who just wants to rest.

A poor high school boy, Izuki Tomonari, got caught up in a kidnapping attempt on Hinako Konohana, a young lady from one of Japan's largest conglomerates. On the surface, Hinako appears to be a brilliant and beautiful young woman, but in reality, she is a lazy girl with no life skills. However, due to family reasons, Hinako has to play the role of the "perfect young lady" at school. Wanting to protect her, Izuki took on the job of caring for her. Eventually, Hinako began to spoil Izuki with all her might. "I don't want... Izuki to leave my side right now." This is a love story that begins beyond the master-servant relationship featuring a princess with a beautiful facade.

Banaza, who got summoned to the magic kingdom of Cryroad as a Hero candidate, due to having only the abilities of only a regular citizen, got treated as a disqualified Hero. He, who originally was supposed to be returned to his original world, due to the magic kingdom's mistake, became unable to return to his original world, inevitably has to live in this world. That kind of person, the moment he became Lv2, acquired all skills and magics, and transcended into a super cheat with all ability points broken through the limit! Even so, he does things at his own pace with an easygoing smile.

In the middle of the 21st century, the world was on the brink of World War III. But superheroes from across the globe appeared and helped bring an era of peace. With the crisis averted, the Heroes returned to their home countries where they now help with domestic matters. This is the story about the young Japanese heroine named “Shy”...

Hiiragi visits Chikage Komori, a transfer student that has never come to school. His chastity is at stake when he comes across a beautiful girl that is wearing nothing but a jacket!? A magical-sex Spring Junior High Student journal begins now!

Yumesaki-san has a problem. Every day she is given a new, random supernatural ability by an anonymous person called God. But for what purpose?

“Huh?! Kyaaaaak!!! W-Why did I suddenly become an anchovy?!!!”

He majors in food and nutrition and has a first-class certificate as a daily sports instructor, the epitome of being a fitness enthusiast, Choi Young-jik! Well, that was who he used to be…

Waking up in the body of Prince Soo-yang, the second son of King Se-jong the Great, he lost all of his bulging muscles overnight.

Young-jik was taken aback when he realized he might be able to meet King Se-jong, his father. He couldn’t contain his excitement at the thought of meeting the magnificent King Se-jong, whether or not it was a dream or reality.

H-Huh? King Se-jong… the Great???

There sits in front of him, a chubby man who looks like he’s struggling to breath.

King Se-jong the Great appears to be severely obese and possibly diabetic… Government officials had chronic illnesses and frail bodies… Choi Young-jik, a seasoned fitness trainer with 15 years under his belt- holding the pride of the fitness community- begins to feel a fire ignite inside him.

“Alright, shall I try spreading the fitness craze in Joseon?!”

Misato-san, a very beautiful office lady who is good at her job, and her boss—Konishikawa-san, a middle-aged man who spoils his subordinates. Misato-san has a strict attitude toward Konishikawa-san, but what are the hidden feelings behind it?! The gap between the seriousness and cuteness will make you faint in anxiety, and this office love comedy with a difference in age begins! (MTL)

In the countryside of Hiroshima, there is a girl who, against all odds, realizes that she is in love with her beloved Sasaki-Kun. Blessed with the opportunity to be sitting next to her crush, she attempts to seduce him with the guidance of the god of teenage love! Meeko-sama! This is the story of a young teen figuring out what it means to be in love and the art of seduction.


Links:
Mangaka's Twitter: https://twitter.com/yasudak00suke
Official Page (JP): https://www.younganimal.com/title/nobukunisan/

Shiori was once a guitarist in a light music club in high school but her first live performance was dashed when her brother ran away from home with a lot of debt, to become a musician in Tokyo.
A decade later, Shiori is now a high school teacher, leading a boring, uneventful life and paying off the debt... till she runs into the ghost of none other than famous guitarist Jimi Hendrix.
The story of a 27-year-old woman on her way to becoming a music legend begins here.

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.

Demon Lords entice people to come to the labyrinth they’ve built and eat the people’s despair as their nourishment.

However, Creation Demon Lord Procell has decided that he will obtain people’s hopes and not their despair as nourishment, and built a happy town instead of a malicious labyrinth to collect human beings.

This is the story of an eccentric Demon Lord, with all its ins and outs.

An ex-pro gamer of the FPS genre (♂) reincarnated in a fantasy world filled with magic... Only to learn that what greeted him was not a scene from one's dreams, but a muddy battlefield full of bullets flying to and fro! Moreover, he's now an orphan girl named Touri Noel?!

After her aptitude for healing magic was discovered, she decided to volunteer in the army as a second-class medic, all to raise money for the orphanage where she was born and raised. However, without even getting magic training, she was attached to an assault squad, repeatedly fighting on the most cruel battlefields of the "Western Front."
The mission given to her was to become the personal medic of the frontline's ace, Garback, and not let him die at any cost. But he turned out to be the worst commander, who will try to get results whatever the cost, even if it means the death of his subordinates!

On the battlefield, mired in unreasonable orders and violence, Touri's fierce battle for survival continues...

After his little sister got raped & killed herself, a teenage boy took revenge & killed her rapist in return.
7 years later the boy's released from prison, determined to kill himself due to insufferable guilt but then he's confronted by the rapist's daughter. A dramatic tale of guilt & atonement.

Takagi Kaito, a low status high schooler, your typical Mob character so to say, was just a normal everyday explorer who hunted slimes every day in the dungeons that appeared in Japan, earning pocket money while admiring his childhood friend, the class queen, from afar. One day, a golden slime he had never seen appears before him. After he defeats it, he obtains an extremely rare item worth hundreds of millions as a drop, a servant card that can summon mythical beings!! After he makes up his mind and summons it, a warrior maiden with unparalleled beauty appears. Rise above being just a mob explorer Kaito! A modern battle fantasy story has begun!

The Jester ― More commonly known as the ‘Playboy’ Dylan, was fired from the party of the Heroes. The self-centred Heroes didn’t understand Dylan’s importance to the group.
They were just a group of one-man teams. Not interested in cooperation at all. Any failures are blamed on the Jester. Dylan, who was disgusted with such companions and was sick of playing as their comedic foil, happily accepted being kicked out.
The Heroes didn’t know. After saving them many times over with his magic tricks, the level 99 Jester can change his job title to that of a ‘Great Sage’.
“Life, how about a rewrite?”
He’s done being the clown. From here on out, he’s going to take the leading role.