Do You Regret It or Not?

He threw himself into reincarnation without hesitation for her, and she vowed to find him again and give him a lifetime of happiness, but she fell in love with another man on the way to find him. She only prayed that they would not become enemies, but God did not realize what they wished for. One of them was killed and one was injured on the way to fight for each other. Faced with the choice, what should she do, so that she could live up to her love for him and her other love?