Rule 34 Dev - 1girl breasts brown_eyes brown_hair character_name closed_mouth dated girls_und_panzer grey_skirt grey_socks happy_birthday highres instrument kantele keizoku_school_uniform long_hair looking_at_viewer mika_(girls_und_panzer) miniskirt naotosi school_uniform signature simple_background skirt small_breasts smile socks solo|24688784718