1girl, bikini, blue_hair, blue_sky, braid, breasts, cloud, cowboy_shot, crown_braid, idolmaster, idolmaster_million_live!, medium_breasts, nanao_yuriko, one_eye_closed, open_mouth, short_hair, side-tie_bikini_bottom, sky, smile, solo, string_bikini, striped, striped_bikini, swimsuit, teeth, upper_teeth_only, wading, water, yellow_eyes, yuko_ka_eru