1girl, :d, black_eyes, black_hair, blush, covered_navel, drain_(object), indoors, innertube, kickboard, lane_line, long_hair, looking_at_viewer, name_tag, one-piece_swimsuit, open_mouth, pool, poolside, reflection, school_swimsuit, shirt, sitting, smile, solo, swimsuit, swimsuit_under_clothes, t-shirt, undressing, water, window