Where are you…

A black and white anime sequence shows a young man with dark hair drinking from a juice box, followed by a close-up of a hand covering his face, then a young woman with pigtails looking forward, a bright flash as two figures run down a hallway, a man with brown hair standing in a room, and finally a spoon resting on a dark surface. The setting appears to be a school or institutional building with indoor hallways and rooms.