Karadasagashi

The story centers on Asuka, a high school student who encounters the mysterious apparition of a former student named Haruka. Bound by an otherworldly request, Asuka finds herself drawn into a chilling supernatural mystery within her school's walls. Alongside her friends, she must navigate the dark secrets hidden in the corridors of their seemingly ordinary school, where a malevolent presence known as the Red Person stalks those who remain alone after hours. As Asuka delves deeper into the mystery surrounding Haruka's fate, she and her friends face increasingly terrifying encounters that test their courage and bonds. The school itself becomes a labyrinth of danger, where every shadow could conceal something sinister, and escaping with their lives may depend on uncovering the truth behind the supernatural forces at work.