1girl, armpit_peek, blue_one-piece_swimsuit, blue_sky, blush, collarbone, feet_out_of_frame, flat_chest, gojarun, horizon, idolmaster, idolmaster_cinderella_girls, jacket, letterman_jacket, looking_at_viewer, murakami_tomoe, one-piece_swimsuit, outdoors, red_eyes, sky, smile, solo, swimsuit, swimsuit_under_clothes, twitter_username