1girl, arshinoe, blue_eyes, blue_hair, breasts, covered_navel, cowboy_shot, hair_ornament, hairclip, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, light_blue_hair, long_hair, looking_to_the_side, low-tied_long_hair, one-piece_swimsuit, shiraishi_tsumugi, solo, standing, swimsuit, white_one-piece_swimsuit