Fatal Frame (Nintendo Cinematic Universe)

Fatal Frame is a Japanese anime series.

Season 1
An aspiring photographer visits a mysterious haunted mansion to find her older brother.

Crimson Butterfly
Two twin sisters' regular visit to their childhood playspot turns into a nightmare when a vengeful spirit attacks them in a haunted village.

The Tormented
During a photography job, a freelance photographer discovers the apparition of her deceased fiancée.

Season 1

 * In 1986, Mafuyu disappears while investigating Himuro Mansion in search of his tutor, Junsei Takamine.
 * Two weeks later, Miku, Mafuyu's younger sister, visits the mansion in search of her older brother.
 * Miku learns that Junsei and his assistants are dead and that Mafuyu was kidnapped by Kirie Himuro, a spirit that haunts Himuro Mansion.
 * Mafuyu bears a striking resemblance to Kirie's deceased lover.
 * Flashback: Shortly before the "Strangling Ritual", Kirie fell in love with a visitor to the mansion. Fearing that Kirie would not want to perform the ritual, the Master of the Himuro Mansion has the visitor killed and lies to Kirie, telling her that the visitor has left. However, she does find out the visitor's fate and as feared does not want to perform the ritual. This caused the ritual to fail and the Malice to leak out, killing everyone in Himuro Mansion and causing the ghosts to remain there and attack anyone who explored there.
 * Miku finds Mafuyu, but Mafuyu decides to stay behind to keep Kirie company.

Crimson Butterfly

 * While on their way to visit their childhood playspot in the Minakami region, twin sisters, Mio and Mayu, follow a red butterfly to a seemingly abandoned village; however, the village contains the tortured souls of the dead, forever reliving the events that trapped them in this state.
 * Flashback: Twins Yae and Sae Kurosawa tried to escape their fate with Itsuki's help. During their escape, Sae was caught and brought back to the village, while Yae escaped. The Minakami villagers desperately hanged Sae to try to satisfy the Hellish Abyss; the attempt failed, causing the Repentance to occur and the village to disappear. During the Repentance, Sae returned from the Hellish Abyss as a vengeful spirit and, along with Seijiro Makabe, made a Kusabi for the Abyss, slaughtering the priests and villagers.
 * Reocurring Moment: Several ghosts refer to Mio as Yae and seem to expect her to perform the ritual with Mayu, who becomes possessed by Sae. Itsuki, however, tries to help her—believing the two to be the Kurosawa twins, he tries to aid their escape from the village again.
 * Mio learns that in Minakami Village, the twin born second is considered the elder, as the village believes that the "elder" lets the weaker, "younger" twin be born first. This completely reverses Mio's implied fate: instead of being sacrificed herself, she must strangle her "younger" twin sister.
 * To save the village, the sisters proceed with the ritual: Mio strangles Mayu, who becomes a butterfly.

The Tormented

 * Freelance photographer Rei Kurosawa has been suffering from nightmares after the death of her fiancée, Yuu Asou.
 * Rei is tasked with observing the "Manor of Sleep", the recurring location of her nightmares.
 * Flashback: Reika Kuze, the last Tattooed Priestess, was tasked with the duty of containing others' emotional pain within the tattoos on her body. Although meant to rest for eternity, Reika had unintentionally released "the Rift", a form of darkness which destroyed the village, after her childhood lover Kaname was murdered in front of her eyes. Now corrupted and unable to rest, she haunts people with a strong attachment to dead loved ones. Within time, the tattoos Reika had cursed her victims with will completely cover their bodies and cause them to disappear, leaving behind black soot, although following the dead would eventually lead to death as well. Because of Rei's attachment to Yuu; Miku's to her brother Mafuyu; and Kei's strong connection to Mio, mourning for her sister Mayu, all three are trapped in the Manor of Sleep.
 * When Miku enters a coma, Rei loses all hope of ending the curse until Kei suggests that by staking down Reika's body in the Chamber of Thorns, she can rest peacefully and no longer endanger them; however, he becomes trapped in the chamber himself upon making a horrific discovery: Reika's body has already been pinned to the ground.
 * With only Rei remaining, she confronts Reika and exorcises her spirit. Following the lyrics of a song in the ritual, Rei puts the bodies of Reika and Kaname in a small boat and pushes it across an underground sea behind the stone ritual chamber - the Abyss of the Horizon, the passage to the spirit world. As the boat begins to vanish into the distance, other dead spirits begin to cross the sea, one of them being Yuu. The tattoo which now covers Rei's body transfers to Yuu, who insists that she must go on living and keep his memory alive.
 * Rei and Miku recover from their comas and resume their normal lives.

Season 1

 * Based on Fatal Frame.

Crimson Butterfly

 * Based on Fatal Frame II: Crimson Butterfly.

The Tormented

 * Based on Fatal Frame III: The Tormented.