1girl, alternate costume, animal ears, arm at side, blush, closed mouth, feet out of frame, flat chest, greyscale, hair between eyes, horse ears, horse girl, horse tail, kneehighs, long hair, long sleeves, looking at viewer, midriff peek, monochrome, multicolored hair, neckerchief, ponytail, sailor collar, shirt, skirt, smile, socks, solo, standing, streaked hair, tail, v