1girl, ahoge, blush, breasts, buttons, collarbone, collared shirt, crossed bangs, dress shirt, feet out of frame, flower, greyscale, hair between eyes, hair flower, hair ornament, hair over shoulder, hairpin, happy, head tilt, indoors, knees together feet apart, large breasts, long hair, looking at viewer, loose neck ribbon, monochrome, neck ribbon, open mouth, outstretched arms, over-kneehighs, pleated skirt, puffy short sleeves, puffy sleeves, reaching, ribbon, school uniform, shirt, shirt tucked in, short sleeves, sitting, sitting on stairs, skirt, solo, stairs, swept bangs, teaching, thighhighs, window