This school was built on forbidden land. The land was cursed and deeply feared by the people. To quell the curse, they saw no choice but to make a human sacrifice. A female student was selected for the role. As a human pillar, she was buried somewhere within the school...
Lahai-Roi
Chapter III: Seven Mysteries of Startorch Academy
Prologue: A Maiden's Heart and the Evening Sky
Act I: Ghost Maiden
Act II: Maiden of a Chance Meeting
Act III: Maiden of Dusk
Act IV: Maiden of Dawn
Act V: Maiden of Longing
Act VI: Maiden of Vengeance
Act VII: Maiden of Oblivion
Act VIII: Maiden of Recollection
Act IX: Maiden of Hatred
Act X: Maiden of Defeat
Act XI: Maiden of Bitter Tears
Act XII: The Dusk Maiden
Segue: Maiden of Exorcism
Lahai-Roi EPs:
Choir Jail
Karandorie
Requiem
John Rover, a (undercover) first-year transfer student at Startorch Academy, encounters a ghost named Chisa Kuchiha after wandering into the Chronorift Metropolis Senoro Sphere that appeared at the Black Shores. Chisa, who lacks memories of her past, explains that she is a spirit bound to the Startorch Academy but now has been stuck inside this Sonoro. Intrigued, Rover resolves to uncover the truth behind her death by going to Lahai-Roi and investigating the school's seven mysteries, which are intertwined with her existence. As they explore these ghost stories, they assist others affected by supernatural phenomena. Eventually, they learn that Chisa's memories were sealed away in a darker manifestation of herself known as "Shadow Chisa/D", and only by accepting this aspect can she recall her final wish—the reason she remains as a ghost.
D is the original Chisa sacrificed to the Threnodian inside the Somoire: IT. D suffered under IT in the Deep Water Zone of the Somoire, watched movies about the previous civilizations that was harvested by IT and recycled in the Gate, the graveyard and birth of civilizations administered by Future Nanami. To restore their connection, he confronts D/Shadow Chisa, reconciling Chisa with her true self.
Chisa desires to remain with Rover. This emotion anchors her to him, ensuring she does not pass on. Instead, she becomes bound to Rover eternally, her existence now tied not to the school but to the man who refused to let her go.