From Tokyopop:

Kantarou, a folklore scholar living in the Taisho period, has various and sundry adventures. But Kantarou moonlights as an exorcist solving the problems of ghosts and demons, all with the help of Haruka, the legendary demon-eating tengu!

Note: The serialization was in a shoujo magazine: Comic Blade Avarus.

The light is gone. Unable to escape the darkness, Pieta repeats the same day. Every day she walks to school down the same road, through the same rain, then talks with her friend Danae. Eventually, she finds happiness in the repetition. The days carry on as normal, until one day, her routine chat with Danae takes a different turn: "What?! You can remember the today that happened yesterday too?" Despite their bleak situation, the girls reach towards tomorrow!

If you think this has a happy ending, you read the title.

The story follows 6 contestant participating in an all-out battle to become the Talisman as a new turning point in their lives.
However is it only a matter of time before their past catches up with them?

I wasn’t reborn with talent or ability, but at least my knowledge from earth allowed me to stay one step ahead in this other world.

Magic exists here, and new progress was rapidly being made in science while magic stagnated in the name of tradition. Using my earthly knowledge and not bound by the traditional thinking, I was able to do things other wizards couldn’t even imagine.

Still, inadvertently becoming an undercover professor for a mysterious secret society at the renowned Sören academy was never in my to-do list!

Olivia is picked up by a death god, Z, deep in the forest as a child and trained by him in combat for reasons unknown. One day, Z disappears, leaving behind a letter instructing Olivia to head to the Kingdom along with a sword bearing the qualities of a death god's weapon. Thus, the girl lacking in common sense, knowledge, and normalcy sets off to join the army.

In the year 20XX.

Despite the fact that the citizens are monitored by IC chips, making the identification and arrest of criminals easier, gruesome murder cases targeting children by an unidentified serial killer are occurring all over the country.

Clad in a black cloak and a clown mask, a deranged serial killer known as the 'Murderous Clown' who poses 'questions' to his victims — the battle between him and the police officer, Yuuto Asakura, begins!

An ordinary office worker, Akira Ichijo, was attacked by a Minotaur on his way home from work.

In the next moment, he woke up in his office desk, Akira was resurrected from death, inherited his level and status, and possessed a unique skill called "Return from the Underworld" that allowed him to restart his life at a certain time.

Now Akira makes full use of his skill and everything he had to search and survive with his childhood friend Nao Nanase to face this cruel world!!

Chakuro is the 14-year-old archivist of the Mud Whale, a nigh-utopian island that floats across the surface of an endless sea of sand. Nine in ten of the inhabitants of the Mud Whale have been blessed and cursed with the ability to use saimia, special powers that doom them to an early death.
Chakuro and his friends have stumbled across other islands, but they have never met, seen, or even heard of a human who wasn't from their own. One day, Chakuro visits an island as large as the Mud Whale and meets a girl who will change his destiny.

Note: Nominated for the Tezuka Osamu Cultural Prize in 2017.

Strange things are happening all over town, and Amano Kouichi's having nightmares again. Several clans are spurred into action as the past gradually resurfaces, while Kouchi and his obsessively devoted younger brother Jun keep having inexplicable encounters that those around them seem to know more about than they're letting on.

What, exactly, is being set into motion, and how do the Amano brothers fit into the picture?

In the world where only the aristocrats have the power to fight the monster - mana. A youth named Kufa is dispatched as a tutor to find Mareida’s talent, a nuisance girl born in a duke’s family. If she is not talented, assassinate her. - that, is the dark side of his task.

7 years ago a strange disaster occurred in the 24th ward when laws of reality were distorted in that area. Our main character is a high school boy who lost his little brother. Can Hanako-san from his school help him find his sibling again?

But more importantly who is this Hanako-san of the 24th ward?

On her 12th birthday, Angele is infected with the strange and fatal disease that causes feathers to sprout from the body. She is sent to a solitary institution to be quarantined where she meets a man named Hakana and the wheels of fate begin to turn. (Source: Mangaupdates)
Based on the free game from Niconico.
Play the game in Japanese: https://game.nicovideo.jp/atsumaru/games/gm4581
Watch a playthrough with everything narrated: https://www.youtube.com/watch?v=wFmcgB3bikM

The manga stars the black-silhouetted "criminal" that appears in Detective Conan chapters to represent the mystery culprits.

An owner of a flower shop has a deficit management, then he encounter the forbidden plant cannabis.

“I don't want it to end…” Akira had made up his mind to confess his feelings to Himeno, the girl he liked, on the day they graduated elementary school. But what was waiting for him in the classroom was Himeno like he had never seen her before! Before they knew it, Akira and his classmates were trapped inside the school, unable to escape. Who was doing this, and why? Mysterious forces close in on the 11 fearful children, as if to laugh at them. This is the story of a harsh fate that awaits them. Does a hopeful future await them, or an ending filled with despair...?

You can't leave this island until you've killed 100 people. The most deadly survival game begins on a solitary island where desires swirl and only the strongest survive!

From DrCoke at MangaHelpers:
He has never been the type to stand out in the class. Kurihara Yuzuru has lived life by avoiding entering the lives of others, staying to himself. The story begins where he has to go to a whole new school, which means new classmates. He lacks any confidence to make new friends, so the fear of rejection drives him into a wish he never thought he would make. This single wish leads to a first day of class he would never forget. Yuzuru will have to make choices that will significantly alter others' lives, choices he could never make in the past.

The story is set in a Japan that is ravaged by plague-like rust, and details the journey of the strongest mushroom hunter Bisco Akaboshi and young doctor Milo Nekoyanagi and their search for the legendary medicinal mushroom “Sabikui”, believed to be the cure for the rust.

An adolescent ghost story that invites college student's "desire". Drinking parties, looking for clubs, romance... Chigarashi Mahina, a freshman who is busy with her flowery college life, is haunted one night by ghosts after entering an abandoned building. Nights after nights, she had nightmares of her getting raped. She then seeks help from a specialist on campus, Makube Kaoru. That was the beginning of a college life filled with desire and fear...