She tries on the uniforms.

Alexa decides she can't afford to risk being caught naked by her roommate, much less masturbating. So she binds her chest, and changes into a pair of her brother's boxers and the t-shirt and sweats included in her athletic wear.

The clothes don't fit very well, of course. The pants are too long and too tight around her hips and butt. She doesn't think she looks like a girl, but she'd be more confident if they were a little looser.

Just then the door opens and her roommate walks in.