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