1girl, 2001_(zufz4535), beach, bikini, blue_sky, blush, breasts, cleavage, collarbone, groin, idolmaster, idolmaster_cinderella_girls, jougasaki_mika, looking_at_viewer, medium_breasts, navel, outdoors, partially_submerged, pink_hair, reflection, reflective_water, refraction, sky, smile, solo, straight_hair, swimsuit, water, white_bikini