Coelacanth

A decade ago, an explosion occurred at Hisano's apartment, though she was absent that day, having been struck by a boy on a bicycle wearing bloodied clothes. The boy dropped a toy scale, which Hisano kept as a charm. Now attending high school, Hisano faces a murder case involving one of her teachers. A man appears with the matching toy scale, and may also experience the hallucinations that have long affected her. Connections between these events gradually emerge.