1girl, ahoge, barefoot, black_wings, blue_archive, blue_one-piece_swimsuit, blush, breasts, closed_mouth, collarbone, from_above, halo, hand_on_own_hip, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, long_hair, looking_at_viewer, low_wings, one-piece_swimsuit, pool, pool_ladder, poolside, purple_eyes, school_swimsuit, small_breasts, solo, swimsuit, thighs, togami_(tobysou526), two_side_up, water, wet, wet_clothes, wet_swimsuit, whistle, whistle_around_neck, white_hair, wings