I'm Paralyzed

A young man with spiky black hair, wearing a school uniform, walks down a crowded hallway, turns to face the camera with a neutral expression, and is then surrounded by other students whose faces are obscured by blue X's. The scene transitions to the same character, now in a white shirt, swimming underwater, viewed from behind as he descends into the depths, followed by a close-up of his face as he sinks, bubbles rising around him.