1girl, arisugawa_natsuha, beach, bikini, blush, breasts, brown_eyes, cleavage, closed_mouth, collarbone, eyewear_on_head, halterneck, idolmaster, idolmaster_shiny_colors, long_hair, looking_at_viewer, medium_breasts, ocean, one_eye_closed, orange_hair, side-tie_bikini_bottom, sidelocks, smile, solo, string_bikini, summer, sunglasses, swimsuit, wet, white_bikini, yuro_(7_yuro)