1girl, armpits, arms_up, bikini, blue_hair, blue_sky, cloud, contrail, cowboy_shot, day, front-tie_top, horizon, idolmaster, idolmaster_million_live!, looking_at_viewer, nanao_yuriko, ocean, one_eye_closed, open_mouth, outdoors, rauto, short_hair, side-tie_bikini_bottom, sky, solo, striped, striped_bikini, swimsuit, thighhighs, undressing, wading, water, yellow_eyes