Rule 34 Dev - armpits arms_behind_head black_one-piece_swimsuit blush breasts collarbone competition_swimsuit covered_navel cowboy_shot female girls_und_panzer green_eyes itsumi_erika kuzuryuu_kennosuke long_hair one-piece_swimsuit open_mouth sideboob simple_background small_breasts solo swimsuit wet white_background white_hair|9792898056