Rule 34 Dev - 1girl :d black_legwear blonde_hair blue_eyes fang female frilled_hairband frilled_legwear frills girls_und_panzer hairband happy_birthday katyusha_(girls_und_panzer) kayabakoro looking_at_viewer open_mouth short_hair simple_background skirt_hold smile solo thighhighs wrist_cuffs|3791962922