1girl, akagi_miria, ass, bad_twitter_id, barefoot, black_hair, blue_one-piece_swimsuit, blush, brown_eyes, double_bun, feet, from_side, hair_bun, hand_to_own_mouth, idolmaster, idolmaster_cinderella_girls, leg_up, legs, lying, on_stomach, one-piece_swimsuit, ripu_(lipi), school_swimsuit, short_hair, soles, solo, swimsuit, the_pose, thighs, toes