1girl, ahoge, aqua_eyes, bare_shoulders, blue_one-piece_swimsuit, blush, breasts, brown_hair, chiyomaru_(yumichiyo0606), competition_school_swimsuit, covered_navel, hair_between_eyes, hololive, looking_at_viewer, medium_hair, natsuiro_matsuri, one-piece_swimsuit, pool, poolside, school_swimsuit, side_ponytail, sitting, small_breasts, solo, swimsuit, thighs, virtual_youtuber