1girl, absurdres, ass, back, backless_swimsuit, bare_shoulders, barefoot, black_wings, blue_archive, blush, closed_mouth, commentary, from_behind, hair_bun, halo, hand_up, haruna_(blue_archive), haruna_(swimsuit)_(blue_archive), highres, looking_at_viewer, looking_back, one-piece_swimsuit, outdoors, pool, red_eyes, red_halo, sion_(im10042m), sitting, smile, solo, swimsuit, tail, thighs, water, white_one-piece_swimsuit, wings