1girl, b1ack_illust, black_pantyhose, black_skirt, blue_cardigan, blue_hair, blush, cardigan, horns_pose, idolmaster, idolmaster_(classic), idolmaster_million_live!, kisaragi_chihaya, knees_up, long_hair, looking_at_viewer, pantyhose, simple_background, sitting, skirt, smile, solo, straight_hair, very_long_hair, white_background