Sui-Tang: Rewriting China's History with My Roommates

After transmigrating into Yang Guang before he becomes Emperor Yang of Sui, the protagonist is just thinking about changing Yang Guang’s fate when he receives the news that Princess Qionghua has died… The Crown Prince is about to be deposed, and the entire Li Yuan family has already left Daxing City. One piece of news after another leaves Yang Guang, who is not yet emperor, feeling utterly insecure. Just then, he discovers that all his other roommates have transmigrated to the Sui and Tang dynasties too…