2boys bird bokko_(wonder_three) brothers clenched_hand duck formal full_body green_background horse hoshi_kouichi hoshi_shinichi multiple_boys necktie nokko_(wonder_three) official_art pukko_(wonder_three) rabbit red_scarf running scarf shirt siblings simple_background striped striped_necktie striped_shirt suit tezuka_osamu_(style) tsunogai watermark wonder_three