He can't afford to owe her a favor, he goes for the skirt.

He had owed his sister favors in the past, often after lost bets or begging her to help him out of horrible situations. He often regretted it, more than once the price for the help had ended being worse than what he had tried to escape.

He would already be ridiculed for wearing girls clothes no matter what. It wasn't so noticeable when he was given her jeans and t-shirts, but dress or skirt would be obvious. K-T didn't think the old dress would survive the day, the fabric was fraying and he spotted that the 2 buttons that would be over his crotch were missing already. The scandalous outfit wasn't worse enough than the dress to warrant being in debt towards his sister.

"Give me the skirt and top," he said, feel his soul escape his body from having to ask to wear something like that.

His sister, with a huge grin, first only handed him the top, enjoying seeing him struggle to fit into it with his dick still hanging around. After some efforts he managed to slip into the tube top despite his larger frame than his sister's. The fit was so tight that the scandalous logo looked almost painted on his chest and he felt like he was wearing some sort of corset. His entire midriff was left bare, his usual strategy of using a long top to hide some unappropriate or missing bottoms wouldn't be in the books for today.

Finally receiving the skirt, it wasn't easier to put it on. He remembered that the stretchy fabric could become see through in some positions, what he hadn't taken into account was that it was designed for someone smaller than he was. The fabric would stretch to even put it on. The tightness of it at least allowed him to put his long dick up and on the side, just bellow the waistband, with good odds that it would stay there rather than dangle under the very short hem of the skirt. Its outline was clearly visible though and from up lose one could see a perfect if shaded picture of it. His balls on the other hand were hanging just a hairwidth from being visible with him standing straight.

He looked like if a very slutty girl had suddenly been transformed into a boy, but at least he wouldn't be submitted to the insanity of being sent to school naked. Ending up naked was already bad enough, but it would be the end of him if he just showed up like this of his own will.

He went downstairs to grab his shoes and school bag. His mother saw him and frowned. For a split second he hoped that she would have words for his sister and ask her to give him something more reasonable.

"Well, I hope this will teach you to be more reasonable with your clothes. You are 18, you need to grow up and be more serious. I swear if you end up living on your own you would live naked in some pigsty of a studio. Now hurry up. And I better don't hear about you skipping class because of this!" She told him, showing him the door.

He walked outside towards the bus stop followed by his sister. They were cutting it close as the bus reached the stop while they were still walking to it. Like a prisoner going to the gallows, K-T climbed the steps up to the bus full of some of his classmates.