1girl, alternate_costume, amagami, ass, black_eyes, black_hair, black_socks, bob_cut, breath, competition_swimsuit, from_behind, gold_one-piece_swimsuit, golden_week, grey_background, looking_at_viewer, looking_back, nanasaki_ai, one-piece_swimsuit, short_hair, sitting, socks, solo, steam, swimsuit, wariza, yoo_tenchi