Seriously, I found this many many years ago and can't recall who the heck did this. I don't think it's manga, btw.

A captivating new teacher, Miss Kasai, arrives at a troubled classroom. The previous teacher had been hospitalized after a tragic attempt at self-harm, driven to despair by student bullying. "My goal as a teacher is to bring joy to my students," she says with a laugh, before turning her attention to addressing the bullies in her own unique way. However, the students are about to discover that Miss Kasai is not to be underestimated. Could Miss Kasai be hiding a darker side?

In a post-apocalyptic world, a group called the Nemesis infected the country with a contagion that transformed the population into flesh-eating zombies. A mysterious man known as the Undead King tries to fight back with a group of survivors and supernatural creatures called gangshi. A young high school boy finds himself drawn into this fight and struggles to stay alive while also trying to protect a young girl ganshi named Yoo Yoo that was left in his care.

The setting is Aonokujima, a remote island in the Pacific Ocean far from Honshu. There, a high school student, Reigo Muraame, lives alone. His parents died in an accident, and his grandmother, who took him in, recently died. Even so, he does not want to leave the island. He has a girl he is in love with, Ichika Kannagi. One summer day, they decide to go to the summer festival together. They are buoyed by the knowledge that there is a secret festival that is held exclusively for adults, and they go deep into the mountains where it is forbidden to enter. Little do they know that this is the beginning of a tragedy.

It was suppose to be just a normal commuter train, but then they notice that all the other passengers have disappeared, and there are only four JKs left...! Although they have never met each other before, they get off the train at the next station, and start thinking about how to make their way home...?This is the rumored supernatural train station...?Lost and unable to return home!The strange daily life of the four JKs begins...!

Two men chat in a prison cell about the war going on outside.

Sugawara has terrifying dreams of bloody murder. What could these dreams be about?

Updating

A school girl who can see ghosts picks up a manga someone left on her desk. She flips open to a random page with the words "Those who read to this point in my manga will die without fail on the same day -- Hamami". It's now a race against the clock to break curse and save her own life...with the help of a friendly (?) ghost that fell in love with her at first sight.

Kanda, a salaryman whose miserable life seems to revolve around working overtime, comes across a murder scene on his way home one night. The murderer was covered in blood… and they turn out to be his former classmate, Lizzie! “It’s like a dream~” says Lizzie, before forcefully inviting himself into Kanda’s home. The sudden appearance of a contract killer gradually invades Kanda’s daily life?

Have you ever been afraid of masks? Well, one's nightmare is about the happen in this short oneshot!

There's a legend that says if a person sees their own ghost, they will die soon.

They live under our feet... Sihwan Kim decides to stay at Dabin Park's house for a while. Little does he know that unidentified ants dwell below... Through an experiment, a monster-like ant creature is born and begins to kidnap people. Will Sihwan and Dabin, who are now caught up in the incident, be able to escape after twists and turns?+

Being a housewife is no picnic, especially if you have to deal with an idiotic hubby, two reckless children, and a mother whose hobby is to decapitate those annoying zombies that are always out to have the best bite of you. A hilariously bizarre tale from the king of gag manga: Kenji Hamaoka of Urayasu tekkin kazoku (Super Radical Gag Family) fame.

Nanfeng and Ya were a team of paranormal investigators with different personalities. Nanfeng loved to investigate various haunted places while Ya prefered to observe the world quietly. They gained some local fame for solving a paranormal case. However, more incidents occurred and their true identities became even more obscured. It was as though someone was drawing them from the school to the city. More and more people were being implicated, and they were being drawn into an even greater whirlwind of chaos.

Moscow Calling takes place in Russia in 2000. This story is about Georgiy Lastochkin, an 18-year old Russian student with mysterious stand. Living in Vladivostok, he studies at a local university, and happens to have a crush on one of his classmates. On one end he has to deal with his everyday life as a student - on the other, he needs to deal with the mysteries of his Stand. One day he begins travelling throughout Russia, all the way from Vladivostok to Moscow! There are sure to be faithful friends and clever enemies, comedy and drama, and of course - Stand battles. Learn what it means to be a Russian Stand user in JoJo's Bizarre Adventure: Moscow Calling! Italian summary: ||Moscow Calling è ambientato nella Russia del 2000. Il protagonista di questa storia è Georgiy Lastochkin, uno studente diciottenne russo con uno stand misterioso. Visto che vive a Vladivostok, studia all'università locale, e si prende una cotta per una delle sue compagne di corso. Da una parte deve affrontare la sua vita da studente - dall'altra, deve avere a che fare con i misteri del suo stand. Un giorno inizia a viaggiare per tutta la Russia, da Vladivostok a Mosca! Incontrerà dei fedeli amici e dei nemici intelligenti, una drammatica commedia, e ovviamente - battaglie con stand. Impara cosa significa essere un portatore di stand russo in Le bizzarre avventure di Jojo: la chiamata di Mosca!||

Naples, 2001. Giorno Giovanna is a small-time crook with one big dream—to become a "Gang-Star." No ordinary thief, Giorno has a connection to the remarkable Joestar bloodline, and possesses a Stand named Gold Experience. His dream starts to become reality when he meets Bruno Bucciarati, a mobster from the gang Passione and a fellow Stand user himself. Realizing that they share similar ideals, and both disagree with the gang's harmful affairs, Giorno reveals his goal to Bruno: with Bruno's help, he will reform Passione by overthrowing the boss. As Giorno becomes a member of Passione, and is inducted into Bruno's squad, he discovers that it is no simple gang; its numbers are teeming with Stand users. Now confronted by other squads of differing loyalties and unpredictable caliber, their goal to change the gang from the inside out will be a tough one. Taking on these adversaries, Giorno attempts to rise through the ranks and inch closer to the boss, a man who is shrouded in mystery.(https://www.viz.com/read/manga/jojo-s-bizarre-adventure-part-5-golden-wind/all)

Updating

JAKDU: Shaman's Blade, Jakdu, The Shaman's Blade, , at manhwawebsiteYongjin is a struggling orphana blunt realist with no time or money to spare on superstitious nonsense. But on his 16th birthday, he finds his life taking a dramatic turn when his classmate Huisu, whom he had never interacted with before, suddenly asks to be his girlfriend. For the first time, Yongjin isn't alonebut his new company isn't exactly the kind he had always wished for, as he finds himself being chased by spirits instead! Though this wasn't quite the sweet sixteen he had in mind, Yongjin must now navigate through a new world he never thought existed.Maybe you like !

Collection of 13 one-shot stories by ero-guro mangaka Suehiro Maruo.Includes one story featuring Midori from (https://mangadex.org/title/082d9c57-8c00-45f2-8376-49f749cfd85b/mr-arashi-s-amazing-freak-show).

The most famous and terrible family of gangsters in the whole world is about to dissolve, once it's revealed the mysterious secret of the third member, Kikunosuke, the most powerful member of the Abashiri. However, the almost pacific life of the Abashiri family gets complicated when Kikunosuke enters in one of the most prestigious elite schools, where instead of learning about art and culture, students must learn the most dangerous techniques for fighting and murdering, at the hands of cruel psychopath teachers. Only a few students manage to survive this hell of a school... but of course, in this occasion, the new student will be most terrible of the Abashiri, and things will no longer will be the same.(Source: Wikipedia)

Beware the red snake! Told from the perspective of a young boy, The Red Snake is a story of the above boy, the house he inhabits, and the forest around his house that stretches on and on. The characters in the story are all mad: his grandfather, who sports a massive growth on his jaw; his grandmother, who believes she is a chicken; his father, who is vicious to the chickens he raises (except for his mother, to whom he provides eggs that so that she can claim she laid them herself); and his sister, whose affection for insects borders on the erotic. The story evolves into a classic nightmare. The Hino Horror series: Hino Horror Volume 1: The Red Snake (赤い蛇 Akai Hebi) Hino Horror Volume 2: The Bug Boy (毒虫小僧 Dokumushi Kozou) Hino Horror Volume 3: Oninbo and the Bugs from Hell (地獄虫を食う! 鬼んぼ Jigoku Mushi Woku! Oninbo) Hino Horror Volume 4: Oninbo and the Bugs from Hell 2 Hino Horror Volume 5: The Living Corpse (死肉の男 Shiniku no Otoko) Hino Horror Volume 6: Black Cat (黒猫の眼が闇に Kuroneko no Me ga Yami ni) Hino Horror Volume 7: The Collection (M Collection) Hino Horror Volume 8: The Collection 2 Hino Horror Volume 9: Ghost School (Ghost School (HINO Hideshi)) Hino Horror Volume 10: Death's Reflection Hino Horror Volume 11: Gallery of Horrors (Kyoufu Gallery) Hino Horror Volume 12: Mystique Mandala of Hell (Kaiki! Jigoku Mandara) Hino Horror Volume 13: Zipangu Night Hino Horror Volume 14: Skin and Bone

Updating

Despite the food shortages caused by famine, the mountain village where the protagonist Kai lives is able to pursue a somewhat better life than others by hunting wild animals. However, one day, a man who says he got lost in the mountains comes to the village. Kai is suspicious of the man, who refuses to make eye contact, but he and his family welcome him. That night, another uninvited beast though sneaks into the outskirts of the village...