Self-inflicted
Bo Anjin's family has always had a curse that they can only fall in love with people who have the same bloodline as themselves. In Bao Anjin's generation, he was the only one left in the family. So when he later met Ni Su, who had the same bloodline as him, his trust was trampled on, and he stabbed his heart with a knife, destroying his city, and said forget it? How is it possible? I want you to repay everything.
As for my old self? Hey, idiot, I'm back to love you.
Intention: Only you are worthy of all your love