takafumi, yuuka (blue archive), blue archive, absurdres, commentary request, highres, 1girl, barefoot, black halo, blue eyes, blue one-piece swimsuit, breasts, competition swimsuit, halo, highleg, highleg one-piece swimsuit, looking at viewer, mechanical halo, medium breasts, millennium science school logo, one-piece swimsuit, poolside, purple hair, solo, string of flags, swimsuit, two-tone one-piece swimsuit, two side up