OVA
Description
Reika Kitami transferred to the Academy as a new student, becoming the target of the Rose Cross witchcraft club led by student council president Nami Kozono. Kozono lured her to an abandoned warehouse under false pretenses, revealing plans to sacrifice her virginity for an occult ritual. Despite Kozono's orders to preserve her purity, club members raped her. During the subsequent ritual in the school basement, Kozono stabbed Kitami to summon the Devil. The ceremony failed, driving Kozono to murder her own club members. Mortally wounded, Kitami killed Kozono and contracted with the Devil for supernatural powers in exchange for damnation after twelve years.

Over the next decade, Kitami wielded wealth and power but grew desperate as her contract neared expiration. Researching escapes, she discovered the soul-succession ritual—transferring her soul into a virgin's body on Walpurgis Night to deceive the Devil. She joined the Priory of Sion to advance this goal, working as a school nurse and forming a romantic relationship with student Naoto Yamanishi before returning to the Academy to seek a vessel.

There, she targeted virgin students Mika Ito, Miyuki Nonogusa, Rika Shiraki, and Kurumi Imari. Using demonic abilities, she seduced and controlled them, manifesting male genitalia through dark magic to rape victims. Discovering student Taki Minase possessed the "Bible Black" grimoire, she seduced him and embedded a lesser demon to enslave him. She forcibly recruited occult club leader Kaori Saeki and her followers, raping them into submission. Kitami also captured art teacher Hiroko Takashiro—a former Rose Cross member—subjecting her to water torture and sexual assault.

Her plan culminated in kidnapping Kurumi Imari, drugging her with aphrodisiacs, and securing her virginity with a chastity belt. During the soul-transfer ritual on Walpurgis Night, Minase and Takashiro interrupted with a forbidden spell. Kitami partially transferred her soul into Imari's body before her original form died.

Years later, Kitami's soul remained trapped in Imari's body, suppressed by Takashiro's seal. Saeki performed a ritual to revive Kitami's essence. Full control returned when occultist bank robbers recited an incantation during a hostage situation, shattering the seal. Kitami killed one robber, raped a bank teller, and stole a shard of the Spear of Longinus to pursue renewed goals.

Her demonic powers encompassed body puppetry, telekinesis, empathic arousal induction, fire manipulation via gaze, biological control inducing madness, glyph-based force fields, telepathy, clairvoyance, and a damage-transferal spell. She demonstrated superhuman strength—twisting an adult man's neck 180 degrees—and created sound-dampening darkness barriers.

Kitami viewed humanity as inherently corrupt, justifying her actions as alignment with a sinful world. Her arc transformed her from traumatized victim to manipulative antagonist, driven by desperation to evade damnation through cycles of possession and violence.