Rule 34 Dev - 10s 1girl animal_ears animal_print bell blush breasts brown_eyes brown_hair cleavage collar cow_ears cow_horns cow_print cowbell female_focus happy_birthday headset horns idolmaster idolmaster_cinderella_girls large_breasts looking_at_viewer navel neck_bell oikawa_shizuku open_mouth pekosuke short_hair smile solo|5249020959