1girl, arm_behind_back, arm_up, bikini, blue_hair, blush, breasts, cleavage, collarbone, flower, gokineko_(roachcat), green_bikini, hair_flower, hair_ornament, hand_in_own_hair, idolmaster, idolmaster_million_live!, looking_at_viewer, medium_breasts, medium_hair, nanao_yuriko, navel, ocean, side-tie_bikini_bottom, smile, solo, swimsuit, wading, wet, wet_hair