From Echochi Scans:

Two families are tied together by a curse. Every 100 years, one person from each family must share the same fate for exactly one year. The pair will be subjected to 12 misfortunes where one will get hurt while the other must sustain their injuries in return.

When Kagura Ikumi was 7, his parents died in an accident. Since then, he has been living an ordinary life. Until the day of his 17th birthday where he meets a mysterious transfer student, Ichijyou Chihaya. However, this fateful encounter between them is only the start of their intertwined fate. For the next year, the two of them will be forced to face 12 misfortunes on the 13th of every month, a curse that has never left any previous pair alive.

Haruma Sakuraba's childhood friend Shuuji Inukai was a cut above him in every way imaginable, living out the glamorous life bestowed upon him. Haruma, an unassuming salary man, has lived his every day clutching onto his inferiority complex, existing only in Shuuji's shadow. One day, Haruma coincidentally met Shuuji's wife, Reika Sumi, who Haruma had always secretly admired since his high school days. With feelings of envy, jealousy, and more, a "secret" is born from Haruma's repetitive days.

Echizen, a game developer known to make the hardest of games to the point that they were near impossible to complete, earned himself the title of the "God Trapper". However, he quits the company when he isn't allowed to do what he's best at: Building traps. His destiny then takes another sudden turn when he is transported to another world which most would describe with the word „hell". He meets the Demon king's daughter and manages to obtain her power, turning him into a true „God Trapper". From there his journey in this new world, he perceives as heaven, begins.

I noticed that I am a weed in the forest, but for some reason, I can think and have an ego. Besides, there is also strange knowledge. I have no choice but to live for the time being, even though I feel something is wrong with the status screen and level as a game. I don’t think I was originally a human being, but I don’t remember much about it.

Aside from that, the light is delicious. When I thought that photosynthesis was good, I met a high elf girl who could hear the voice of plants. It’s great to be able to talk. For the time being, while giving fruits, I was pulled out by a girl and went to the elf village. I’m being carefully raised, yeah? Somehow it smells like spring.

Apparently, the elves are a persecuted and exiled race. However, because it looks good, there are some undeliverable people who aim them as slaves. A weed that already lived with elves like their families struggles to protect everyone. Evolve!

This is a story of a kind-hearted weed that protects an elf, or a “world tree” that will eventually lead many.

A high school 3rd year student, Miyamoto Dai, whose heart was touched by Jazz, continued to play the Saxophone alone in Kawahara, rain or shine, day or night, for many years. "I want to become the world's best Saxophone player...!!" Effort, talent, faith, environment, luck...which are necessary? A tale of reaching towards his goal recklessly and sincerely begins in Hirosegawa, Sendai.

Note: Was nominated for the 8th and 9th Manga Taisho Award. Won the 62nd Shogakukan Manga Award for general manga. Won the 20th Japan Media Arts Festival's Grand Prize for Manga.

Akira Natsume seems to almost have a phobia of electrical devices while also being very good at diagnosing them. He resolves to change himself for the better and get a girlfriend like his older brother did... But then Akira suddenly dies in an accident. 16 years later a special policewoman and her android partner retrieve and activate a highly advanced AI and super-weapon called EX-ARM and put it into full control of their ship as a last resort. Turns out the AI is actually just Akira's brain!

"I'll give you a chance. A chance to be forgiven." The father sold his daughter. And the daughter returned from Hell. In an empire with a diversity of the living and the dead, the young Rena Rubel was destined to die as a sacrifice for her father. But six years later, the girl who everyone thought had died, came back to life. Taking off the mask of a little lamb, and becoming a lion.

Deathco is a girl who's good at killing...and not much else. She works for The Guild, an international league of assassins whose members infamously dress in costumes when they're hunting their targets.

Follow the daily activities of the members of the Game Club.

Was released in doujinshi format by Imitation Crystal, consisting of short volumes split into several parts.

After a series of bizarre incidents in his school, student Kometaki Okaka decided to investigate the cause of it. What he discovers will turn his world upside down.

Note: This series has been cancelled, on the mangaka's request, at 44 chapters. For more information, see here.

Ruri, a college student working part time at a convenience story, finds herself drawn to Nosegawa, a middle-aged customer who comes in every day to buy two packs of cigarettes. When she works up the nerve to ask him for a ride home one rainy day, their interaction in the car kindles something in Ruri's heart - a strange and unknown new heat...

The 12-year-old boy entrusted his destiny to the dying nation!

Hercule is a boy who was raised as a successor to the declining Lemuria empire. Hercule has been crowned as the new Emperor of the empire, which is on the verge of being destroyed by the previous emperor, but in fact he has a secret that no one knows about...? This is the story of a young emperor who becomes the savior of the Lemuria empire and the champion of the three continents.

A new idol on the rise, Souda Natsumi and her friend from highschool Iiyama Yukiya meet again at a music store. What lies at the end of this unwanted encounter?!

Berta’s marriage was suddenly arranged, she will become the second consort of the King. The current royal family values lineage above all else, with several generations of consanguineous marriages, to preserve its “purity.” The politics of the Kingdom, following the idea of the pureblood noblemen’s superiority, caused national power to decline. To retain the power of the Kingdom, the Royal Family decided to take a desperate measure, a marriage with a woman from the ethnic group to which belongs the majority of the population. The bitterness of this act… Those who were previously considered a subjugated group of people living on the frontiers.

The chosen bride is Berta, the first daughter of the current lord of Kasha, the largest estate on the frontier and also a powerful faction. The marriage life started in hard mode, a husband that doesn’t love her, a Queen that hates her, however, she still is forced to fulfil her role duties. Berta has decided to endure the hardship, that was already expected by her, and wait for the day when there’s no more need of her in the palace, and she can return home. However, Berta’s initial plans are ruined by an unexpected situation. After passing three nights with the King, as the royal rules dictated for a newlywed bride, Berta got pregnant with His Majesty’s child!!

Suzuki Ryuuto is an introverted, timid college student. Every day he puts on a fake smile, trying his best to blend into a group of outgoing students even despite cruel teasing about his virginity.

But one day, he comes to a drinking party where he meets a beautiful girl, Kokoa. Per her request, he starts to pretend to be her boyfriend to ward off the stalker who is harassing Kokoa.

That tender love was the beginning of a tragedy...

Tomorrow is Garam’s 25th birthday and not only have her parents forgotten, but she still hasn’t found a full-time job. As she lay in bed wishing for another life, the clock strikes midnight and a strange window opens up before her. She steps through and discovers that she’s a pathfinder, or a traveler of worlds. But somehow stepping into this other world has caused her family and everything she knew back on earth to disappear. To rejoin her family and set things back to normal, Garam will have to learn all that she can about being a pathfinder.

The most popular guy at school may not be so popular at all? To prove his worth, he confessed to the most beautiful girl in his grade, but she flat out rejects him! The boy does not give up, no, but when he tries to get close to her, he may be just falling for her for real?

An autobiographical manga about Itagaki Paru, her two older sisters, mother, and father.

For 2000 years, a separate race of humanity has lived on the moon. Known as "the Moonrace," their technology is leaps and bounds beyond those that stayed behind on the Earth's surface. Now seeking to return to their original home, the Moonrace send three teenagers - Loran, Keith, and Fran - down to Earth on a reconnaissance mission to test the viability of its environment.

After spending a year on Earth, Loran has become good friends with Sochie and Kihel, daughters of the prestigious Heim family, and he looks forward to fully integrating into Earth society. But before Loran gets the chance to make his report, the Moonrace launch a surprise attack. Earth's primitive airplanes are no match for the superior power of the Moonrace's mobile suits. However, in the midst of the initial attack, Loran and Sochie uncover a long-forgotten relic: a white mobile suit. As a Moonrace, Loran is quickly able to grasp the basics of piloting it, but by doing so, he inadvertently places himself in the middle of a war.

Eris Boreas Greyrat is a former noble girl, who one day was transported to the other side of the world with her cousin Rudeus. She grew as a swordswoman, but ultimately was unable to save Rudy as he was nearly killed. Deciding that she wants to be someone who can support him rather than the other way around, Eris decides to leave Rudeus and go on her own journey.

This is a spinoff of Mushoku Tensei, which splinters off from the main manga at around chapter 51 (volume 6 of the light novel, first season of the anime).