The closest employee, Hideki Masterson

As fate would have it, Hideki was the first to be within reach of the expanding bubble.

He didn't notice that reality subtly changed around him as a secret door melted into existence behind him. He didn't notice that he suddenly knew full well of the existence of this secret door, nor that when his phone beeped with a message to go downstairs and do his job.

Hideki rolled his eyes as he logged off the computer, checked no customers were looking at him as he turned around and opened the secret entrance. Stepping down the winding stairs, Hideki didn't notice how his casual work outfit began to morph into something tighter and more effeminate. His trousers split into sheer, thigh high socks and a mini skirt. His boxers morphed into lacy string panties with a pouch for his junk and a garter belt, suspenders sliding down and attaching to his socks.

Hideki stopped at a mirror in the hallway and checked his face as his shoes grew into shiny three inch heels. A small shelf next to the mirror had some lipstick and other beauty products available for a quick touch-up, but his face had just morphed from a pudgy male's with no make-up to a much more feminine one with a beautiful layer of make-up on it, his lips perking up along with his head filling with years of experience about how to use them.

His shirt unbuttoned a cleavage as straps of a bra slid across his shoulders, pocketing two bee-stings that remained on his chest as he rapidly began to lose weight and bulk on his arms, shoulders and gut. His torso shrank down while his hips expanded slightly, his butt filling up with some of the exess fat from his now nicely toned stomach.

Hideki smacked his lips as he evened the lipstick over them, giving himself a slight moan of approval. It wasn't perfect, but it was good enough for what they paid him around here, he concluded as he clacked down the hallway towards the door where his latest client would be waiting for his handiwork.

He was a king at sucking dick, and after a decade of HRT he looked great while doing it. As far as he could remember, he'd taken steps to maximize his talents for fellatio. Not only did he love doing it, it was his calling in life. Sure, some customers figured he had something extra in his underwear an weren't happy about it, but those usually had thought they were getting more than a blow job with their order.

Hopefully the current customer weren't one of those who thought he could have his cake and eat it too, Hideki thought to himself as he adjusted his underwear, his tiny dick getting slightly erect and leaking some pre-cum at the anticipation of tasting a real cock. It's been too long, he realized and smiled as he opened the door.