The Strongest Imperial Son-in-Law

Wen Shaoyu, the strongest Immortal Emperor, is ambushed by his enemies as he attempts to take the final step. His soul travels into the body of himself in a parallel world. When he wakes, he discovers that he is a live-in son-in-law of the Zhao family. Though he's invincible, an oath sworn to Heaven by the original owner leaves him no choice but to keep playing the part of the Zhao family's useless live-in son-in-law.