Magical Girl: My Girlfriend Is Not a Boy

[Gender-changing marriage/magical girl/containment/childhood sweetheart/pure love] (Yu Jie x Shota, the male protagonist has a magical girl form) A miracle allowed Ye to be transported into this fantasy world of magical girls. He saw from the memory of his mother that this place was so real, cruel yet beautiful and romantic. Ye couldn't wait to come out of the belly and show off his skills, but... Why did I turn into a girl? Forget it, if it's for extraordinary power, then what's the harm in giving up a man's dignity? But, holy shit, I'm already 20, why haven't I turned into a magical girl yet? Am I not a time traveler? Am I not the protagonist? Looking at the brother beside him, forget it, it seems that it would be good to spend this life peacefully... But fate is like this. What does it mean that you, a boy, can also become a magical girl? What does it mean that you are actually a reborn person? What does it mean that I will become your wife in the future? So I am not the male protagonist, but the female protagonist?