1girl, ahoge, bikini, blue_hair, bob_cut, breasts, frilled_bikini, frills, idolmaster, idolmaster_cinderella_girls, idolmaster_cinderella_girls_starlight_stage, kamiyaminatsu, large_breasts, light_blush, looking_at_viewer, navel, o-ring, o-ring_bikini, pink_hair, swimsuit, yumemi_riamu