1girl, american_flag_bikini, ass, bikini, blonde_hair, blue_eyes, blush, breasts, butt_crack, flag_print, from_behind, girls_und_panzer, grin, kay_(girls_und_panzer), large_breasts, long_hair, looking_at_viewer, nanashino, shiny_skin, side-tie_bikini_bottom, simple_background, sitting, smile, solo, swimsuit, white_background