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A pink-haired girl in a school uniform embraces a dark-haired boy on a school walkway, while a dark-haired girl in a school uniform watches from a distance, then reacts with shock while holding a phone, followed by a close-up of her wide eyes, then a red-tinted silhouette of a figure holding a knife, and finally a close-up of the dark-haired girl with blood on her face and neck as she holds a knife.