From Demonic Scanlations:

Due to all of the anger and emotions of humans, the world has been inhabited by ghosts that feed off humans. Unfortunately, these ghosts can’t be seen by ordinary humans. A high schooler has the ability to see these ghosts…

From Dag Ågren:
A whimsical tale of both Japanese and western horror lore, unrequited love, and cats.

From Tapastic: The world has come to chaos. An unknown virus haunts every living soul, and one man is determined to reach his beloved before it's too late. His journey takes him closer and closer, but he faces adversity and strife. That's when he faces reality. He sees the world around him. He sees a world faced with something more dangerous than the virus. Original Webtoon / Official English Version

From MangaHelpers:

In response to a decrease in population, human corpses have become a major resource for society's labor pool. Necromancers are needed to animate corpses for various jobs. These corpses work reliably unless they encounter human love, at which point they go berserk and attack. Zen is the necromancer of his city, and he spends his time animating corpses and dealing with the messy aftermath of those cases of 'necrophilia.'

Zen has a strange assistant, who keeps his face covered and never speaks in public. This assistant is Yomai, a ghoul that Zen took under his wing. Zen allows Yomai to feed from his own flesh, but he has strictly forbidden the ghoul from revealing himself to, speaking to, or eating other humans. Yomai doesn't want to anger his benefactor, but he is not completely satisfied living under all of Zen's restrictions. There's plenty of violence, death, and surprises ahead for the necromancer and his ghoul! [tethysdust]

IF I SURVIVE 100 MISSIONS FOR 3 YEARS, I CAN SAVE MY FAMILY

Shougo Yanagida is a horror mangaka who just moved into the Ghost Heights Saigou apartment block. Unfortunately, deadlines aren't his only problem. After being appointed the president of general affairs, he'll have to help out his fellow oddball tenants.

From Mangahelper :

Humanity is on the brink of extinction as a flower known as “Viscar” infects humans and animals, turning them into mindless hosts that feed on others. If you get bitten by the infected, or inhale the pollen that emits from their bodies, the flower will plant itself into your brain. Humanity is fighting a losing battle against this world-wide pandemic, and most people have given up hope.

Volt was once part of the army and had been assigned to be the guard of Dr. Kisling, the scientist leading the development of a vaccine to fight against the Viscar. From an unfortunate accident, one of the contained Viscar pollen escaped, infecting Dr. Kisling. Dr. Kisling’s final wish to Volt was to find his daughter Lilith, and, with her help, continue the development of the vaccine. Lilith and Volt now venture into the post-apocalyptic world to bring back hope to humanity.

A collection of illogical plot lines.

From The Faiien Scans: Protagonist XiaoFei used to be an ordinary guy from H city. After the spring water was contaminated with a virus, however, he unexpectedly encountered an unprecedented crisis. The people living in H City became zombies one by one, devouring each other, and gradually evolving. Can XiaoFei escape from H city and meet up with his girlfriend Wei? The story now begins...

A boy's terrifying dream that brings an end to a humanity that is rotting. A high school student named Gi Haru, who has an illness that prevents him from differentiating between reality and delusions. His only friends are his studious friend Kang Yul and girlfriend Kang Lee Ha. However one day, after seeing a hallucination of a Nazi assembly during his friend Kang Yul's poetry recitation, the school falls into a pandemonium of hell where everyone is killing each other, but Gi Haru believes it to be another one of his delusions. However, that was the blunt truth. That day, where the mass murder of the entire student body took place, (The starting day) Gi Haru kills his girlfriend Kang Lee Ha with his own hands, is betrayed by his one and only friend Kang Yul, and ends up losing both his eyes. Afterwards, he was detained in a mental institute as the culprit of massacring the entire student body, but after receiving help from the capable group of the Panthers he begins to chase after Kang Yul and begins the road of vengeance.

Demon summoner - what is this? And why?... These are the main questions Touya Douji is trying to answer. Just where should he be looking for them? Maybe, inside himself?

Do you want to understand the meaning of life? Do you really want to live?

A cataclysm has destroyed the cities and empires of men and disfigured the spirit of humanity. In this nightmare, it falls to him to descend a mysterious tower in search of absolution. Is the angel correct that he is responsible for the destruction of the world, and what can he do in this monster infested world to redeem himself?

Based on the Saturn/PSX/PS2/Wii game Baroque.

From The Zero Alliance:

At Seirei Academy, a series of mysterious demonic ceremonies have been taking place and the transfer student, Yuriya Yuuki is suspected by his classmates. One evening, from his dormitory window, Yuriya sees a girl wandering outside and follows her. Once outside, he encounters a book which allows him to summon the demon Belial, whom invites Yuriya to enter into a contract with him…

Zhong Kui, in traditional Chinese culture he was a god who was skilled at dispelling ghosts and other evils. He was born with a fierce and atrocious face. While he was quite ugly, he was also brilliant, outspoken, and tenacious. This story is not entirely based on tradition. It folows Zhong Kui through a fantasy world of ying and yang.

This is the story of several people that possess ESP powers, known as (PSI)

Biohazard 3: Last Escape is a series of Hong Kong manhua (Chinese-language comics) written as a tie-in to Resident Evil 3: Nemesis. It was published by SkyWalker Comics.

What would you do if money could be exchanged for life? Sell ten years of life for a fortune, or give up everything to buy one more year. At the age of 17, a high school boy who has it all together meets a man with superpowers that are both godly and demonic. Through a deadly struggle for his life, he stumbles upon a world "on the other side"!

Saving the life of the girl he loves, Sahu incidentally turns into a zombie. And now he's trying to survive in a stone jungle, believing that one day he will sing for the world.

The more you think about it, the scarier it gets. This is about things that are everywhere and nowhere.