Rule 34 Dev - 1girl absurdres accordion birthday black_hair breasts brown_hair character_request girls_und_panzer green_eyes grin happy_birthday highres instrument keizoku_military_uniform koyama_harutarou large_breasts mika_(girls_und_panzer) pleated_skirt pompadour school_uniform skirt smile upskirt yuri_(girls_und_panzer)|21930988716