relaxjon, matoi ryuuko, kill la kill, bad source, commentary request, 1girl, ass, back, backboob, bikini, black hair, blue bikini, blue eyes, breasts, butt crack, cowboy shot, cropped legs, from behind, gradient background, grey background, halterneck, large breasts, looking back, lowleg, lowleg bikini, median furrow, medium hair, micro bikini, multicolored bikini, shoulder blades, signature, solo, string bikini, striped bikini, striped clothes, swimsuit, two-tone bikini, white bikini