When the apocalypse came to Chang'an, Li Yu bound to the "China on the Tip of the Tongue" system. At the beginning, he was left alone by Emperor Taizong of the Tang Dynasty on his deathbed, and the most favored little Sizi was stuffed into his arms. He just wanted to save his life, but the Princess of the Tang Dynasty, whose smile was sweeter than candy, was always out of his calculations - the cold iceberg was promised, but why did he obediently hand over the candy when she acted coquettishly? How did the promised survival in the apocalypse turn into a daily routine of protecting cubs?