>>7293246He was getting hit on by guys.
He wanted to become a suave dude to have girls at his feet by becoming a male idol.
He asks for a job to become an idol. Gets denied from becoming a male one, offered to become a female one as he looks better as a girl, promised that if he's succesful he'll be allowed to make a debut as a boy later down the road.
He reluctantly accepts the offer.
Read it up in the manga. There isn't much of it translated but it explains what I just told you in greater detail.