From MangaHelpers:

Shinomiya Ryouma is working frantically to raise a billion yen for his sister's medical bills, while going to high school. One day, a mysterious woman asks him, "Would you put your life on the line for what you desire?" After receiving a ticket from her, he gets caught up in a fatal accident. When he wakes up, he finds he's turned into a girl and what's more, he's participating in a "game" where a win means he can reverse his fate but a loss means he'll die instantly.

Taro Kajiura and his friends from a research group at Tonan University embarked on a trip to Ikishima Island in order to pursue the origins about Princess Kannon. At the same time, the villagers of Ikishima were holding an annual festival in which outsiders were forbidden to participate in for over 400 years. The consequences for breaking that tradition were much more severe that any of them had imagined...

Spirits of those who've died a tragic death are unable to be led to the afterlife by the Black and White death gods (黑白无常). They wander aimlessly in the world of the living, unable to reincarnate. Two death gods go in search of the missing half, but will the person they find still be the person they were once familiar with?

After her mother passed away, a young girl named Pepe disguises herself as a boy in order to work. Keeping her mother's pendant with her, she travels to a secluded mansion to work as a servant. While working she stumbles across a secret passage leading her to a prison. Behind the prison bars is a man in a pig mask who calls himself Jack.

A short Souichi and Tomie crossover.

Kyou Ayaha is a third year high school student who excels in everything he does, even sports. With nothing exciting happening in his unchanging life, he spent his days bored out of his mind. But he had no idea that this life of his was about to collapse...! He went to Shibuya with three other people he usually hung out with: Minto, Renka, and Mawata. There, they witnessed a gruesome scene, as the clothes of people coming and going through town transformed into ferocious monsters, tearing humans into pieces! Everywhere in Shibuya, every type of clothing, and sorts of textiles and fibers started eating people and overrunning the town! Amidst his crumbling life, can Kyou survive this terror...!?

After alien technology falls to Earth and humankind uses it to develop giant robots with applications in industry and security, Japan and other countries create academies to train students to use them. An aspiring robot pilot, Maki Natsuhito, tries his best but his prospects in the field look dismal, not helped by the fact that his crush, Asato Kana, is one of the school's aces.

Everything changes with the arrival of Fishes, a mysterious smiling girl who offers Maki the power to fight a new alien threat, but who exacts a heavy price on the exchange. Now in possession of abilities others could only dream of, Maki will find that the idea of a hero is very different from practice.

A university student befriends a young boy who is her distant relative. She's initially taken in by his beautiful appearance, but slowly starts to realize that strange things are happening around her…

In order to give his family a fresh start, Akio buys a house in the countryside. However, there is something very wrong with the house, and what should have been a haven of peace slowly turns into a nightmare.

A collection of stories:

1. The Outsider by H.P. Lovecraft
In this work, a mysterious man who has been living alone in a castle for as long as he can remember decides to break free in search of human contact and light. “The Outsider” is one of Lovecraft's most commonly reprinted works and is also one of the most popular stories ever to be published in Weird Tales.

2. The House with the Mezzanine by Anton Pavlovich Chekhov
“The House With The Mezzanine” is the story of a somewhat diffident young man, a painter, and his somewhat tenuous romance with two sisters during a vacation; the story is laden with the impressionistic images conjured up by its narrator and is one of Chekhov’s finest short stories.

3. Twenty-six Men and a Girl by Maxim Gorky
“Twenty-six Men and a Girl” is a pioneering story of Social Realism (predating Soviet socialist realism), and is a story of lost ideals. Twenty-six men labor in a cellar, making kringles in an effective prison. They are looked down upon by all around them, including the bun bakers. Their only seeming solace is the sixteen-year-old Tanya who visits them every morning for kringles they give her.

4. Ju-ga Original Series by Tanabe Gou

Two Yandere flirting with each other.

Zombies occupied Japan in only a month. To avoid being infected by zombies, Eito Hasaba, along with his mother and younger sister, head for a
“sector”, a blockaded safe zone. But soon after their arrival, Eito gets seriously injured during a disagreement and is thrown out of the sector. With his consciousness dimming, Eito sees a pack of zombies coming and resigns himself to his fate. But what does he discover when he wakes up? A story of a living dead anti-hero begins.

With the growing demand for high-quality organ transplants in Japan, many underground organizations have carried out kidnapping and murder operations to obtain organs for sale; surgeon doctors also started practicing. It even began to intervene in outside countries like China.

Our protagonist, Tamaki Suzuhara, a beautiful but mysterious high school girl, tries to find someone very important to her who is currently missing. She joined an illegal organ trafficking network, which kidnapped those who were judged "morally cure" for morphological, surgical removal of organs.

Let's see where this bloody journey and Tamaki Suzuhara's moral dilemma will lead. Can she find what she wants?

After their death, people's memories fade. The wish to retrieve the fading memories of his deceased girlfriend leads Wu Nian to become the Magician of Memories.

Hasumi Seiji, who teaches English at a high school, is affectionately known as "Hasumin" by his students. He's popular, good-looking, kind to everyone, and efficient at teaching and solving problems. However, this "perfect" teacher has a much darker side.

Akira secretly fancies his childhood friend Kurumi, but she is in love with his buddy Umezawa. Akira is jealous of Umezawa, but is touched by his solid friendship. The threesome should have spent happy school days despite the uneasy triangle. But one day, some students suddenly start attacking other people, turning into human-eating monsters. In the ensuing chaos, Kurumi and Umezawa also turn into one of those cannibalistic monsters. Cornered by Kurumi, Akira braces himself for her fatal bite, but at that very moment, she comes to herself. But that was just the beginning.

"The detective Kasumi and her human assistant Atori find themselves pursuing a case that involves the disappearance of multiple young girls. What happened to them, nobody knows - yet."

Originally published in the Towako series.
Towako Volume 3: Witch of the Fire Scene - Stem
Towako Volume 4: Witch of the Fire Scene - Bloom

A girl struggles to survive in a zombie apocalypse and ends up finding herself a boyfriend! But there is a problem...he is undead!

In this series:
Tenson Kourin (天孫降臨)
Yomi kara no Koe (黄泉からの声)
Rokufukujin (六福神)

The Purger, a serial killer is lurking around the dorm. Can Dan find who it is, before he himself is killed?!