What Would Happen If a Man in His 50s Became a Villainous Daughter?

It seems a man in his 50s has transformed into a villainous lady. There's almost no romance element. It's funny and a little tearjerking. I'll do my best to make the old man become a cool adult. There's no romance. There's no harem. Is this a cheat? It doesn't feel like it. There is an old man.