We Agreed to Slack Off Together, So How Did You All Become Great Emperors?

[Cunning protagonist + no System + humor + ruthless and decisive] Yun Bai never expected that he would transmigrate while having a meal with a few of his brothers. Even more surprising, they all transmigrated together. That would have been enough, but what he never expected was that his brothers had arrived a thousand years before him! By the time Yun Bai transmigrated, he discovered that all three of his brothers had become Great Emperors! With three Great Emperor brothers backing him, just watch how Yun Bai creates a legend of his own in this world! [I'm terrible at writing blurbs, so please head to the main story.]