Smile :)

A looping sequence shows a series of anime characters with exaggerated, wide smiles, each face filling the frame in a close-up shot. The sequence begins with a dark, red-tinged smile, transitions to a bright white smile, then shows the back of a character with spiky hair, followed by a close-up of a character with dark hair and a red shirt, then a character with sharp eyes and a small smile, and finally a character with red hair and a wide, toothy grin, all set against dark or indistinct backgrounds.