Anime about little girls…

A sequence of anime characters appears in quick succession, each displaying a distinct facial expression or pose: a white-haired character with closed eyes and a blush, a dark-haired character with wide eyes and a blush, a yellow-haired character with closed eyes and a hand on their cheek surrounded by pink hearts, a light-haired character with closed eyes and a smile, a brown-haired character winking and making a hand gesture, and a close-up of a character's open mouth. The setting is not clearly defined, with each character shown in a separate, indistinct background.