Yamamoto, Hideo

Susumu Nakoshi is a middle-aged man who spends his days between a lavish first-class hotel and a park full of homeless people. One day, an eccentric young man approaches Nakoshi in search of subjects willing to partake in trepanation—the procedure of drilling a hole in the skull. 

This mysterious person claims that Nakoshi is the perfect man for the experiment. Initially rejecting the offer, he doubles back on his decision after his car gets towed off. Nakoshi agrees to let Manabu Ito, a 22-year-old medical student, drill a hole in his skull in exchange for 700,000 yen. The procedure bears no results at first, with Nakoshi showing no abnormalities. This normalcy comes to an abrupt end, however, when Nakoshi begins seeing the homunculus in every person. With his perception distorted, how will Nakoshi face these homunculi?

[Written by MAL Rewrite]

Homunculus

ホムンクルス

Akino, Matsuri

Beyond the mist-filled alleyways in the concrete crevices of Los Angeles' Chinatown hides a mysterious pet shop, home to many bizarre yet friendly creatures. The store's proprietor is an enigmatic young man who goes by the name of Count D.

Count D welcomes those who feel lonely and wounded through the doors of his shop, claiming to sell "love, dreams, and hope" in the form of the fantastic beasts that lie within. Each creature comes with a special contract accompanied by a set of rules. However, he warns customers that he cannot be held accountable for any consequences of breaking the rules.

Short-tempered detective Leon Orcot traces the source of several crimes back to Count D and what the former considers to be a pet shop of horrors. Determined to find proof that the Count is a criminal, he begins to pay regular visits to the shop.

[Written by MAL Rewrite]

Petshop of Horrors

Pet Shop of Horrors

Petshop of Horrors (ペットショップ オブ ホラーズ)

Inada, Shiho

Ono, Fuyumi

Mai Taniyama's school has an ancient, abandoned, and allegedly cursed building. Whenever it is about to be torn down, a series of unsettling deaths occur and halt the demolition. To prove it is haunted, Mai and her friends try to summon a specter by telling ghost stories. No ghosts appear, but the group encounters Kazuya Shibuya, a 17-year-old transfer student. Though her friends are charmed by Kazuya's attractive looks and great manners, Mai does not trust him.

Following a mishap, Mai discovers Kazuya's real identity as the president of Shibuya Psychic Research, a group hired by the school principal to investigate the building's rumored paranormal activity. As a consequence of her actions, Mai must temporarily help Kazuya if she does not want to pay him damages. Joined by other individuals experienced with the supernatural—former Buddhist monk Houshou Takigawa, self-proclaimed Shinto priestess Ayako Matsusaki, famous medium Masako Hara, and Catholic priest John Brown—Mai and Kazuya must uncover the mystery surrounding the building before any more innocent lives are lost.

[Written by MAL Rewrite]

Ghost Hunt

ゴーストハント

Maybe

A young woman, by some strange occurrence, was left to die alone in the former building of Seikyou Academy. Mysteriously, there is one person who can see her in ghost form: Teiichi Niiya, a freshman. Now they both seek to find out the reasoning behind her death, and what could have caused it.

(Source: DBR Scanlations)

Tasogare Otome x Amnesia

Dusk Maiden of Amnesia

黄昏乙女×アムネジア

Yuki, Kaori

Deep in the heart of 19th century London, a young nobleman named Cain walks the shadowy cobblestone streets of the aristocratic society into which he was born. Forced to become an earl upon the untimely death of his father, Cain assumes the role of head of the Hargreaves, a noble family with a dark past. With Riff, his faithful manservant, and Mary Weather, his 10-year-old half sister, Cain investigates the mysterious crimes that seem to follow him wherever he goes.

(Source: VIZ Media)

Included one-shot:
Volume 5: Nichiyoubi no Solomon Grundy

God Child

Godchild

ゴッド チャイルド

Fujisaki, Ryuu

Nothing ever happens in the village of Sotoba. In fact, it is viewed as nothing more than a hick town by its most outgoing and fashionable resident, Megumi Shimizu. She wants nothing more than to live in the city, far away from the villagers and their outdated ways of thinking. So when a new European-style house is built on a hill in the village, Megumi believes its residents must be cultured and refined, so she decides to pay them a visit.

However, Megumi doesn't return home that night. After a grueling search, she is found the next day, weak and anemic, with strange bite marks on her. But Megumi is just the first victim in what will soon become an epidemic in Sotoba as the bodies start piling up. The village doctor Toshio Ozaki, along with the priest Seishin Muroi, the loner Natsuno Yuuki, and the Tanaka siblings Kaori and Akira, begin investigating the strange deaths. But the answer to their predicament may be more than any of them can handle, for soon the dead could outnumber the living.

[Written by MAL Rewrite]

Shiki

屍鬼

Ima, Ichiko

Ritsu inherited his sixth sense from his grandfather, along with a demon guardian named Blue Storm. Strange things just seem to happen around these two, and it's left to them to get to the bottom of all these mysterious events. Each story is independent but features recurring characters you'll come to know and appreciate as they, each in their own way, try to deal with things 'not of this world'.

(Source: MU)

Hyakki Yakoushou

Beyond Twilight

百鬼夜行抄

Mizushiro, Setona

Mashiro Ichijou, an attractive and popular high school student, has always lived his life as a boy. However, nobody notices that deep down, he resents the fact that his body is half female. He has decided to conceal his femininity from those around him, while in reality, he is insecure about who he is supposed to be.

One day, an unfamiliar nurse asks Mashiro to follow her to the school's infirmary in the basement—an office that has never existed until now. Little does he realize that the moment he steps into the mysterious room, he will never be capable of returning to being the person he was before.

As he struggles to find his true identity, Mashiro must face the disquiet in his own heart, all while protecting himself from the prying eyes of his classmates. Slowly but steadily, the unbecoming truth of the world is laid bare: all its lies and deceit engulfed in nightmares that only unfold in broad daylight.

[Written by MAL Rewrite]

Houkago Hokenshitsu

After School Nightmare

放課後保健室

Count D has opened his petshop again, this time in Tokyo's Shinjuku!

For those who haven't read Petshop of Horrors, Count D's Petshop is a place where one can find animals from the most ordinary housepets to savage predators to mystical beasts that should belong only in legends. Customers often find that their new pets change their lives more than they expect, fulfilling their dreams, or realizing their nightmares.

(Source: MU)

Shin Petshop of Horrors

Pet Shop of Horrors: Tokyo

新 Petshop of Horrors

Miyako, Ritsu

Kaminaga, Manabu

Based on the novel by Kaminaga Manabu. Shinrei Tantei Yakumo (Psychic Detective Yakumo) tells a story about a college student, Saitou Yakumo, who was born with different eye colors. His red left eye gave him the special ability to see ghosts and spirits. He believes ghosts and spirits are bound to earth because of a certain 'cause' and simply by eliminating that 'cause', those spirits will rest in peace. Being asked for help by Ozawa Haruka, together they began the investigation.

(Source: Fateful Encounters)

Included one-shot:
Volume 1: Mail x Tomodachi

Shinrei Tantei Yakumo: Akai Hitomi wa Shitteiru

心霊探偵 八雲 ～赤い瞳は知っている～

Suzuki, Yasushi

Katou, Akatsuki

Shinrei Tantei Yakumo tells a story about a college student, Saitou Yakumo who is born with different eye colors. His red left eye gives him a special ability to see ghosts and spirits. He believes ghosts and spirits are bound to earth because of a certain "cause," and simply eliminating that "cause" will let those spirits rest in peace. Being asked for help by Ozawa Haruka, they begin the investigation together.

(Source: Fateful Encounters)

Shinrei Tantei Yakumo

心霊探偵八雲

Natsumi, Kei

Ryukishi07

Every year, the Ushiromiya family attends a gathering held by the eccentric family head, Kinzou, on the island of Rokkenjima. As his health is failing, most of the family believe he doesn't have much time left. So as a typhoon rages on outside, so too does the storm in their hearts as they squabble amongst themselves over the inheritance and the claim of being Kinzou's rightful heir.

Battler, Kinzou's grandson, has returned to Rokkenjima after a six year absence, expecting the gathering to go smoothly. However, his eccentric grandfather has other plans; he enacts a bizarre game, challenging everyone to find his hidden gold. The one who finds it also receives the most coveted reward of all: the leadership of the family. However, their game is beset with violence and murder when the participants are used as "sacrifices" to revive the Millennial Witch of Rokkenjima, Beatrice.

Ever the skeptic, Battler doesn't believe in the occult. But when so many around him turn up dead, he is forced to question whether it was the work of magic or the machinations of someone among them.

[Written by MAL Rewrite]

12 Manga Like Makina-san, Asobimashou