Shida

A girl's memories, emotions and humanity are shattered like so many pieces of a puzzle. Lacey, a girl who's lost everything falls into a labyrinth of chaos. To step inside, is to step into a world of chaos and death. The Gibbet Room. Even so, the girl opens the door, to find what she has lost, herself.

(Source: Takeshobo, translated)

Gibbet Room

ギベットルーム

Tanio, Gin

Mikanbako

Yurukowa! Muteki no JK ga Shinrei Spot ni Totsu shimakuru

Yurukowa! An Invincible Girl Attacks a Haunted Spot

ゆるコワ! 無敵のJKが心霊スポットに凸しまくる

Ayasato, Keishi

Ise Ebi Boil

Nekonome Yuuka wa Kataru bekarazu

猫ノ目ゆうかは語るべからず

Taebal

Kim, Hongtae

No one knows why these people are stranded here with death looming in the corner. As loneliness creeps in, it becomes all too easy to seek solace in others. But they must trust no one but themselves. Remember, the goal is to survive.

(Source: Webtoon Entertainment)

Survive

서바이브

Baek, Nara

Oscar

A thirst for revenge drags Raymond into a sinister game at his new boarding school, as he finds himself the mouse within a dorm of twisted cats who wish to devour and defile him in the worst ways imaginable.

(Source: Tappytoon)

The Bad Life

불우한 삶

Kojima, Abashiri

Yagate Tako ni Naru Kimi to

やがて蛸になるきみと

Mushino, Sunagimo

Fukao, Narabu

Saibou Shinkyoku: Cell of Empireo. - A Certain "0.5"

細胞神曲 -Cell of Empireo.- A certain "0.5"

Dalgonyak

In search of perfect love, 16 men and women participate in the dating reality program "Paradise on Earth." With sparkling blue seas and warm sunshine 365 days a year, this place is a paradise-like island. However, in the second week of filming, the staff members infected with an unknown virus begin to show strange phenomena, and paradise turns into hell in an instant. All contact between the island and the outside world is cut off, and rescue efforts are out of reach. Will they be able to survive to the end?

(Source: Naver, translated)

Paradise on Earth

지상낙원

Daidai

Toumin, Yui

Aquarium wa Odoranai

The Aquarium Does Not Dance

アクアリウムは踊らない

Rokujouhan

Commit a sin, and a "bug" attaches to you!

Misao is a young boy who can see the "bugs" that attach themselves to people who have committed sins.
Small bugs for minor sins, large bugs for grave sins...

Through these bugs, Misao is able to measure the weight of a person's sins. However, he gradually begins to see bugs that defy these rules, and at the same time, strange incidents start occurring around him...

(Source: Shogakukan, translated)

Warui Mushi

わるいむし

Tamura, Mitsuhisa

Don't overlook any anomalies. If you find anomalies, turn back immediately. If you don't find anomalies, do not turn back. To go out from Exit 8.

(Source: Playism)

Manga Like Gakkougurashi! Otayori