This is stupid unhealthy manga teaching people stupid unhealthy lessons.
If you don't like idea of gender being assigned to you, then stop thinking about yourself in terms of it at all.
For heck's sake, what does it even mean "being female on the inside"? Are you insane? Human mind has no gender, it's an attribute of body.
"I want to be called a general, since I was always fascinated with military. If you don't call me that, I'll feel offended, cry and run away"
Why do people have to blow out huge dramas about having a meat sausage attach to them? Aren't they just god damn narcissists simply consumed with how they look? I don't see any other reason why.
Try to prove what I've said to be wrong.