Close-up of an anime girl's determined face in a sports jersey.

The video opens with a close-up of an anime girl in a sports jersey, then transitions to a boy introducing himself and his older sister. They are on a train, and the boy explains they are stepsiblings. The scene then shifts to a building, identified as a girls' dorm, and the sister announces that the boy will be the dorm manager and acting coach for their team. The boy reacts with surprise.