1girl, o, akagi_miria, ass, bad_twitter_id, bare_legs, black_hair, blush, brown_eyes, couch, double_bun, feet_up, flat_chest, hair_bun, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, lying, on_couch, on_stomach, one-piece_swimsuit, ripu_(lipi), short_hair, smile, solo, swimsuit, the_pose, white_one-piece_swimsuit