1girl, bicycle, bike_shorts, black_shorts, blue_sky, breasts, cleavage, collarbone, grey_hair, hairband, idolmaster, large_breasts, long_hair, looking_at_viewer, outdoors, partially_unzipped, purple_eyes, purple_hairband, purple_shirt, riding, riding_bicycle, shijou_takane, shiromigi, shirt, shorts, sky, smile, solo, unzipping