Not exacly yaoi but more like genderbend

The crown prince (CP) and the son of the duke (DS) fell in love with each other but being gay is frowned upon in the kingdom. So CP visits a witch to turn DS into a woman. So DS turns into a woman just before he heads to war. DS was mad but said she (because he a girl now) had no time to fix this and she'll worry about it after war. Stuff goes downhill and she gets raped and they did stuff to her organs so she doesn't get knocked up but they win war. They went back to the kingdom then DS found out that she couldn't inherit the throne because only males can do that bla bla bla and she couldn't get married even if she wanted to because of that incident so DS's sister was the one that got married but her husband was awful so she (DS sister) committed suicide and her husband ruined the duchy. DS got removed from her position as a knight deemed unfit for combat. So she basically lost everything because the prince turned her into a girl. The prince can't marry her because again of that reason and she has no more power. He still loves her but he a coward.
DS: If you didn't do this to me none of this would've happened.
PR: I did this for us! So we could be together.
DS: Why couldn't YOU be the woman then?
PR: Im the prince of the kingdom. I can't possibly
DS: and you thought it was okay if it was me? I lost everything because of this. My position, my life, everything my parents worked hard for, and even my family. Did everything go according to your plan, your highness?