1girl, bikini, blush, breasts, brown_hair, dated, halterneck, horizon, huge_breasts, idolmaster, idolmaster_cinderella_girls, lens_flare, looking_at_viewer, looking_back, oikawa_shizuku, outside_border, short_hair, shoulder_blades, smile, solo, striped, striped_bikini, swimsuit, umasan, upper_body, yellow_eyes