1girl, adapted_costume, amagami, ass, back_cutout, black_hair, black_one-piece_swimsuit, blue_jacket, blush, breasts, brown_eyes, clothing_cutout, competition_swimsuit, indoors, jacket, looking_at_viewer, looking_back, nanasaki_ai, on_chair, one-piece_swimsuit, one-piece_thong, serizawa_(serizawaroom), short_hair, sitting, sitting_backwards, small_breasts, solo, swimsuit, two-tone_swimsuit, unworn_jacket