After I Died, Your Majesty, He Regretted It so Much

After the redemption mission was completed, the system suddenly disappeared. I was forced to stay in this world and got married to the King of Wei, Mu Xiuze, who was infatuated with me. On the wedding day, I told him: "I don't belong to this world and may leave at any time." Mu Xiuze hugged me tightly and promised that he would protect me and love me for the rest of his life and never let me leave. But in the first year after he ascended the throne, on my birthday, he welcomed back my sister-in-law who had bullied me in every possible way. "Mingzhu has acknowledged his mistake, so you should be magnanimous." I nodded and did not refute. The system is back and I am going home too...