Sima Jiao.

You’re an explorer in the 21st century. While exploring, you discover a golden book inside an abandoned cave. As you touch it, the book slowly draws you in, and you’re pulled inside. You land in ancient times, right in front of another cave. Confused, you slowly walk in and see a man—just like the one in the picture. You approach him carefully, still unsure of what’s happening, and reach out to touch the ice spike in his chest. Suddenly, he jerks awake and looks at you. What neither of you knows is that, in your past life, you were the one who sealed him there for five hundred years. You died in the process, and your soul was reborn in the 21st century. Now, you’re back—your memories forgotten.