1girl, amagami, apron, ass, black_hair, black_one-piece_swimsuit, breasts, brown_eyes, competition_swimsuit, cowboy_shot, from_behind, holding, indoors, looking_at_viewer, looking_back, nanasaki_ai, one-piece_swimsuit, serizawa_(serizawaroom), short_hair, small_breasts, smile, solo, swimsuit, two-tone_swimsuit, waist_apron