Rule 34 Dev - 2boys animal_ears animal_print bed_sheet bell bottomless boy_cow brown_hair collar cow_ears cow_print cow_tail cowbell harry_potter harry_potter_(series) hooves horns kneeling male_focus milk multiple_boys numeri_(pixiv) open_clothes open_shirt school_uniform shirt tail tom_marvolo_riddle tongue wand wizarding_world yaoi|2817901476