1girl, aruman, ass, bad_pixiv_id, bare_shoulders, barefoot, black_hair, blue_one-piece_swimsuit, blurry, blurry_background, blush, breasts, brown_eyes, collarbone, competition_school_swimsuit, dark-skinned_female, dark_skin, fang, feet, foot_focus, full_body, groin, hair_ornament, hairclip, hand_on_own_thigh, ijiranaide_nagatoro-san, indoors, long_hair, looking_at_viewer, lying, nagatoro_hayase, on_floor, on_side, one-piece_swimsuit, pool, school_swimsuit, skin_fang, small_breasts, soles, solo, swimsuit, thighs, toes