Rule 34 Dev - 1girl absurdres arm_behind_head black_hair blue_eyes blush breasts covered_erect_nipples cube_(huidama) girls_und_panzer glasses halterneck happy_birthday highres large_breasts looking_at_viewer messy_hair navel one_eye_closed oryou_(girls_und_panzer) panties sakamoto_clan_(emblem) short_hair underwear|20691964098