1girl, arm up, armpit crease, armpit cutout, atsuko (blue archive), black one-piece swimsuit, blue archive, braid, breasts, clothing cutout, covered navel, cropped legs, dano, grey hair, hair over shoulder, hand up, highleg, highleg swimsuit, long hair, long sleeves, looking at viewer, medium breasts, one-piece swimsuit, parted lips, red eyes, solo, swimsuit, thighs, twin braids, wide hips