You were a guy and you shouldn't be wearing one

"I am a guy and I shouldn't be wearing a bra. Sergeant."

That agitated her further.

"Get on your feet. Empty everything in your gym bag."

You got on your feet and emptied your gym bag. There were only basically the clothes you wore to board the train, the slip and the sports bra.

"What is this?" Sergeant Rin held up the sports bra.

"Sports bra, Sergeant Rin." you replied.

"I can't hear you!" Sergeant Rin raised her voice.

"SPORTS BRA! SERGEANT RIN!" You shouted as well.

"And what did the enlistment letter said, soldier?"

"To wear the given clothes when reporting."

"Remove your T-shirt and wear the bra. This is an order." Sergeant Rin said.