K-On!

A blonde-haired girl in a white and red collared shirt with a yellow strap stands in front of a building, initially looking forward with a neutral expression. Another blonde girl with pigtails appears from the right, grabbing the first girl's hair and pulling her head back, causing her to scream with her mouth wide open and eyes squeezed shut. The second girl maintains a wide-eyed, open-mouthed expression of shock or excitement, raising her hand in a gesture. The first girl's head is pulled back and to the left, her face contorted in a scream, while the second girl's hand remains on her hair,