A girly one obviously!

The store assistant started heading to the left of the counter, towards the ladies section. Mike gulped in excitement, realizing what this would mean. The store was only small, and Mike could see few items on display, but noticed that the girls side was made up of mainly skirts, jumpers and dresses. Mike had never considered cross-dressing before, but now that the reality was presenting itself, he was genuinely excited by the prospect. He watched as the worker headed for a clothes rack, picking up a coat hanger, with the view being obstructed by a display in front of him. She beckoned Mike over to the counter.

As Mike approached, he saw her raise the garment. It was a black turtle neck jumper dress.

"You're going to look great in this!" She laughed. "Put it on. we have a changing room just in the back!" Picking up the dress, Mike moved toward the back of the shop knowing that today, he will be the subject of much humiliation. But this would not necessarily be a bad thing.

Mike had stripped down to his underwear in the changing room, about to put the dress on when a pair of white panties flew over the curtain.
"You need to wear these as well my dear!" a female voice chuckled, "No good wearing horrible shorts underneath! Oh, and this!" A padded bra soon followed over the curtains, landing on his shoulder.

Stepping out of the changing room, Mike caught his reflection in the store window. The jumper dress was tight to his body, coming down to just below his ass. The padded bra had given him a much needed bust, but he was still definitely a boy in women's clothing. The sales assistant stood in awe at her creation, laughing and smiling.
"You look so cute, and I know that everyone that see's you today are going to love you're new outfit!"

Mike could sense himself growing excited, and a small bulge began protruding through his dress. The assistant noticed this.
"Although my dear, you're outfit is not complete!" She handed Mike a pair of white knee boots and a black shoulder bag. Putting the boots on, Mike found that they stuck to his legs, making him feel entrapped in his outfit. He found that the assistant had placed all of his possessions inside the black bag, as well as what seemed to be a make-up kit. Finally, the assistant handed him a white fluffy jacket to wear.

In his completed ensemble, Mike looked incredibly girly and felt embarrassed, but could not help but feel excitement. The sales assistant had been teasing him throughout, and Mike was impressed with how she made him feel. He was debating whether he should give this girl more power over him, or head of to school ready to face the ridicule of his classmates.