Batman and robin

Amy and gwen once inside their respective boxs see it fill up with a blue gas that slowly fills up their lungs as they both start to change becoming more male and growing bigger muscles as their breasts get smaller and smooth as their asss gets smaller as well as they both become super handsome men with muscles and as their hole body changes as the final changes happened as they feel their body gradually growing cock and balls from out their pussys as they both become 100% male. Amy gets a batman costume while gwen gets a robin costume.