Yu Yu Hakusho1992

Elder Toguro:
What a sad life when your friends aren't even straight with you, but I will tell you everything about the frailty of your human kind. It's the story of a young, impressionable human girl named Genkai. She was the most beautiful girl in all the land. She was a fighter who wanted to be the very best in the world. Then she met a man named Toguro who also wanted to be the best, and he agreed to play with her. They did everything together. So much so that the man nearly forgot his own brother. The woman and the man were even in love. But then the woman became ugly like a prune and no one wanted to be around her.

Younger Toguro:
[warningly] Brother...

Elder Toguro:
[still to Kuwabara] Oh, it's okay. He's just a little anxious because this next chapter is his favorite part in the story. You see, the man became a demon who had stayed strong and'd never become a prune. The ugly woman became extremely jealous of the handsome man and went to fight him, but she wasn't strong anymore, so the man was happy to murder her.