The morning of the first day of training camp.

She stood in front of the unfamiliar men's national volleyball team dormitory in place of her twin brother.

Until just a few days ago, she hadn't even thought about picking up a volleyball.

It was a dream she had given up on as a child because of her parents' opposition. Then, she suddenly got a call from her twin brother.

"I can't make it to this camp. Something came up."

"So... you go instead of me."

It was absurd, but her brother knew how much she loved volleyball.

And now. Disguised as a man, she opened the door to the dormitory, carrying a bag with her brother's name on it.