1girl, amagami, armpits, arms_up, black_hair, black_one-piece_swimsuit, bob_cut, breasts, competition_swimsuit, looking_at_viewer, medium_breasts, nanasaki_ai, one-piece_swimsuit, open_mouth, parted_lips, poolside, short_hair, solo, swimsuit, tomaro_(katsui_suchika), upside-down