you cannot change history and you cannot tamper your fate once you've set on the path. if he doesn't kill him and if he doesn't kill yeonju, his existence alone will eat him alive I'm afraid.
Now now you sound like a plot, my dear fellow friend
I'm the oracle I'm afraid
you cannot change history and you cannot tamper your fate once you've set on the path. if he doesn't kill him and if he doesn't kill yeonju, his existence alone will eat him alive I'm afraid.