1girl, animal_ears, b1ack_illust, black_hair, black_leotard, breasts, brown_eyes, covered_navel, detached_collar, fake_animal_ears, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, kitakami_reika, large_breasts, leotard, long_hair, looking_at_viewer, pantyhose, playboy_bunny, rabbit_ears, seiza, sitting, solo, strapless, strapless_leotard, twintails, wrist_cuffs