He reversed time, back to the time before it all started, 6 years before he tasted his death. He died several times in his previous lives, staging a coup against the king. He only used you before, but in sixth life he realized that you were loyal to him. Unfortunately he was only interested in the throne at that time. He married you, again.

"Well, let's start from the beginning. I'm not interested in the throne in this lifetime," he said after the wedding party, without explaining further.