1girl, adjusting_hair, amondo, ass, backless_swimsuit, black_hair, black_one-piece_swimsuit, blue_archive, blush, breasts, halo, hand_in_own_hair, hasumi_(blue_archive), huge_breasts, looking_back, one-piece_swimsuit, ponytail, pool, poolside, red_eyes, red_halo, rei_no_pool, shiny_skin, sitting, solo, swimsuit, window