Blue Phoenix - Chapter 671: Sylph

Leon Walker, the world-weary genius of modern world, is killed in a freak accident — the notorious Truck-Kun makes an appearance. Death is only the start. He finds himself reborn in a new world, Galvia, reincarnated into the strong but failing body of Duke Leon Moonwalker, one of the only three Grand Dukes of the Moonstone Kingdom, a minor but strategically powerful kingdom within Galvia. As Leon attempts to understand his new world, a strange voice resonates in his head. “Supreme Spouse System Activated.”.

Seven years ago, after their breakup, he disappeared without a trace.Now, he reappeared on the eve of her wedding, sparing no means in forcing her to marry him…With a certificate of marriage, he bound her mercilessly to his side.From there, this “Cinderella” began her journey as a wife of the business empire’s heir...Mrs Huo - composed, sharp-tongued, and freakishly smart.Mr Qin - wife-spoiler to no end and a complete “slave” to their daughter.Quality love story, one on one. You are welcome to get hooked on this story with us.

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates