My Son-In-Law Who Comes to My House Is Not a Human Being

"Suzaku" became the son-in-law of the Lin family in order to save the love of his heart. Unfortunately, his love didn't know that he was the brother Xiaobei she had been looking for for more than ten years, and she always treated him coldly. Faced with the ridicule of his father-in-law and his mother-in-law, and the ruthlessness of his beloved, how should he fight back? Faced with the prophecy of annihilation handed down from ancient times, as he has the ability to change everything, will the human race take revenge? How should he choose?