1girl, alternate costume, ass, bikini, bikini top only, black bikini, blue eyes, blue hair, blue shorts, breasts, day, from behind, green headwear, ground vehicle, hair between eyes, hair bobbles, hair ornament, hat, kagiyama shachou, kawashiro nitori, large breasts, looking at viewer, looking back, micro shorts, motor vehicle, motorcycle, outdoors, shorts, solo, summer, sweat, swimsuit, thong, touhou, twitter username, two side up