When an orphan encounters the eldritch demon Shub-Niggurath, the "Black Goat of the Woods with a Thousand Young" offers him one wish. His request: "Become my big sister."

The original H-doujinshi and sequel to the series that was adapted into non-H "Ane Naru Mono". A story about a boy and his demon elder sister.

Makie's a boy in love, with his tall, older classmate Sachi. As a sign of his affection, he makes Sachi a special lunch every day. Sachi loves Makie, too, but she has a secret... she's actually a shapeshifting...

From Seven Seas' Arkham Woods page: Kirsti Rivers is an LA girl suddenly transplanted to the small New England town of Arkham Woods. Kirsti and her mother are there to clear out and sell the house left to them...

The eternally young and immortal transmigrator Lin Ze summoned the tentacled eldritch god as a wife for companionship throughout an endless life….. but will how their own motives impact this supposed life of...

What links together two bands of worshippers, one deep in the Arctic snows, one hidden in the bayous of Louisiana, is more than their shared practice of blood sacrifice. It is the inhuman phrase they both chant...

Kurumato Umi who has lived as an introverted person with no friends because she grew up with strict parents who worship an evil god. One day, she picks up an unfamiliar polyhedron from an antique shop after a...

As a result of the efforts of the people of Chaldea, the human incineration plan of those who called themselves the Magic King was bitterly stopped at the water's edge, and the destiny of the world seemed to be...

A trendy girl and aspiring idol thought she'd get a pet octopus to make it big as a pet idol, but she ended up getting Cthulhu! With the help of an elder god, aim for the top!

In 17th century Europe, in the depths of a forest, lived a vampire boy named Isaac. He would devour all who entered his forest. Yet, he saved a girl named Livana solely because her flame-like hair resembled his...

The story centers around Nyaruko, a formless Cthulhu deity of Chaos (Nyarlathotep) who can take on the shape of a seemingly ordinary silver-haired girl. Mahiro Yasaka is a normal high school boy who is being...

From MangaHelpers: This side story of "Haiyore! Nyaruko-chan" focuses on their daily life. The deity from Lovecraftian mythos, Nyarlathotep, has come to Mahiro in the form of a young girl. She explains that the...

The God of Destruction Magu Menueku has been summoned by the Chaos Cult. Humanity's last hope is the honorable Holy Knights! The battle to save mankind...took place hundreds of years ago... But now a girl out...

https://www.cmoa.jp/title/249828/

In volume one, the story of “Lamia” and “Chaos Seeker” are included. After surviving a devastating motorcycle accident, Jun Tachikawa starts to hear mysterious voices (Lamia). When Nagisa Hoshima returned home,...

With the rising tide of steam power and machinery, who can come close to being a Beyonder? Shrouded in the fog of history and darkness, who or what is the lurking evil that murmurs into our ears? Waking up to...

With the rising tide of steam power and machinery, who can come close to being a Beyonder? Shrouded in the fog of history and darkness, who or what is the lurking evil that murmurs into our ears? Waking up to...

An ordinary Japanese high school student takes home an abandoned supernatural cat left in a cardboard box. Maybe he shouldn't have meddled with kitties beyond human comprehension—after all, it had tentacles...

The story is using a mix of various religions teachings and some Lovecraft mythology as a background, set in a far future and distant world, in which "psycho science" is trying to change the destiny of the...

In a town called INOATAMA-CHO, strange things are happening, and two high school girls, Shiori and Shimiko, fight against ghosts and monsters. A strange world populated by weird people and mysterious events...

Adapted are: The Cats of Ulthar, Celephaïs and The Other Gods.