Toshoshitsu no Neversista

During a stormy summer night, a student met his death. He left to take a picture of the rising waters in the river and never returned. All that was left of him were his belongings and the camera by the riverbank. Even after days of desperate searches, all anyone could find was one of his shoes. In the end, he was treated as a casualty of the river...but soon other, sinister rumors of his death began to emerge. That the five friends who used to live in "The Haunted Tower" with him -- one of them, some of them, all of them -- may have had something to do with his cursed death. Enter two people. One, the student's older brother. He receives a mysterious letter about his brother's death, and as soon as he begins to investigate, he's hit by a blunt object and loses consciousness. Only to wake up again in a dark room with five students surrounding him, interrogating him, and knowing that they will never let him leave... Two, an idealistic assistant teacher who just arrived in town. He receives a cryptic warning from an intruder in his dorm, "The Haunted Tower," to "never think those five are children" -- the poor, sad, well-behaved five students who undeservedly suffer from bad rumors. Caught between paranoia and the desire to trust his students, one day he finds a book titled "Neversista," which holds a startling truth... [Edited from Aarinfantasy Forums]