1girl, arm support, breast pocket, chair, collared shirt, cowboy shot, desk, greyscale, indoors, low ponytail, monochrome, necktie, open mouth, pleated skirt, pocket, school chair, school desk, school uniform, shirt, short sleeves, sidelocks, skirt, smile, solo, standing, striped necktie, thighhighs, window, zettai ryouiki