takafumi, original, absurdres, commentary request, highres, large variant set, variant set, 1boy, 1girl, age difference, arm around shoulder, bench, black hair, blurry, blurry background, breasts, brother and sister, brown eyes, cameltoe, collarbone, competition swimsuit, covered navel, grey hair, grin, height difference, highleg, highleg one-piece swimsuit, indoors, lane line, looking at viewer, male swimwear, multicolored swimsuit, one-piece swimsuit, onee-shota, pool, short hair, siblings, small breasts, smile, standing, string of flags, swim briefs, swimsuit, white male swimwear, white one-piece swimsuit