When a mother's sudden disappearance leaves behind a cryptic message and a series of strange hits, a daughter must uncover the truth about her past, her mother's mysterious past, and the chilling connection to a string of unsolved crimes....

In a mysterious dormitory filled with enigmatic figures, Ryoubo-kun embarks on a cryptic quest to uncover the truth behind his mother's mysterious disappearance, leading him through a labyrinth of secrets and hidden truths....