[Yamamoto Naoki] Sekai saigo no hibi - Shuppatsu | Last Days of the World: Departure [Rainash]

A schoolgirl in uniform, clutching her chest and announcing she feels ill, slips away from classmates toward the nurse's office as whispers echo in the hallway. She encounters a mysterious black dog that claims to be a dark omen and a divine messenger, while a sudden, graphic assault erupts, splattering blood and forcing her to confront the horror of her own vulnerability. The narrative builds tension between the ordinary school setting and the unsettling supernatural threat, leaving the protagonist stunned as she processes the violent climax.