solo, masterpiece, best quality, outdoors, stadium, cowboy shot, sitting on stairs, knees up, full body, looking at viewer, smile, closed mouth, blush, kuroka, yellow eyes, slit pupils, black hair, long hair, parted bangs, hair rings, cat ears, animal ear fluff, cat tail, multiple tails, white shirt, short sleeves, gym uniform, blue buruma, black thighhighs, white sneakers, arm support