The Halloween Misunderstanding.
Just looking for a convincing makeover, our innocent victim is mistakenly shuttled into a forced sex change, experiment using a device designed to speed up the process.  She'll be such a convincing girl by Halloween, that she'll need another costume as just looking like a girl, is no longer a "costume" !  At first she thinks it's just an elaborate makeover and is pretty exciting at trying out a new gender. Her excitement is picked up by the unscrupulous "makeover expert". This expert is looking to add to his harem of newly minted girls who will be hired out for various and sundry duties. Through hypnosis and brain wave alteration Mitsy will believe and act like she's always been a girl and an expert at performing certain valuable "duties".  In addition to the brain's transformation, will, of course, be a total physical transformation. This is accomplished via a 2 way special hormone cocktail delivery system. A valve is adjusted as need to vary the top end delivery from the bottom end delivery. Vibrators are also used to help the body more quickly absorb the "juices"!  She will wake up thinking she's always been a girl and is eager to do more bidding for her master, who she's conditioned to adore.

EstroFemme Forced Femme Tag Teamed, by RD Dave and Mr Big

It took two sessions to clean out all the boy stuff