The anime “Citrus”

A young woman with long dark hair stands in a school hallway, looking forward as other students move in the background. The scene transitions to a wide shot of a multi-level school atrium, then to a close-up of a blonde girl with a thoughtful expression, followed by a sequence of two girls in school uniforms playfully wrestling on a bed, and finally a close-up of the dark-haired girl with a blush on her face.