Reborn: From Disgraced Crown Prince to Eternal Demon Emperor

The emperor had no idea he was being cuckolded. He doted on his sixth son so much that he personally stripped his own eldest son of his position.

Xiao Qian was reborn. You little traitor, you still want to frame me, get Father to strip me of my crown prince title, become emperor, and unify the realm? Keep dreaming!

And you, Father: when you find out that Consort Li has cuckolded you spectacularly, when you learn that the Sixth Prince you doted on since childhood isn't your son, and when you realize you suppressed your own flesh and blood for this bastard, will you be so angry you spit blood?

In this life, he volunteered to guard his mother's tomb. When the Northern Di cavalry returned, trampling through the capital and about to break through its gates, only then did the Great Qian Emperor and his court remember the man who had once fought across the realm and expanded Great Qian's borders, the empire's God of War.

Great Qian Emperor: "My son, hurry and save me! You want the throne, right? Your father will hand it over to you at once!"

The court officials: "Your Highness, if you don't come out of retirement soon, Great Qian will fall!"

The city's nobles, kneeling in supplication: "Please come out of retirement, Your Highness!"

Xiao Qian: "Get lost!"