k-on!

A blonde woman in a black dress with a striped headpiece poses as neon text identifies her as "KEYBOARD TSUMUGI" against a dark background with hanging lights and gift boxes. The scene transitions to a green, glowing forest where three women in black dresses with distinct headpieces—Ritsu, Tsumugi, and Yui—each appear in turn, reaching toward or interacting with the luminous environment.