Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 15 - 15-1. To the Weasel Empire

Lyle Walt is a young noble boy and heir looking forward to the day he can inherit his family’s territory. Except around when he was 10 year old, his parents started neglecting him more and more in favour of his little sister, Celes.
On his fifteenth birthday, he is challenged to a duel by his sister to see who will inherit the household and horribly loses, being cast out of his family. Afterwards, he gets treated by the family groundskeepers and receives the family heirloom Gem from him that Lyle’s grandfather had entrusted to him. From there, he begins an aimless journey with his childhood friend and former fiancée, Novem, and the Gem-turned-Jewel that houses the memories, personalities, and Skills of seven of his ancestors.

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

Andrew traveled across the magic continent. With a low talent, he unlocked the Witch Cultivation system.

After completing the task of unlocking the witch, he could upgrade and obtain the element ability of the witch.

You gained 100 points of experience from the Fire Spirit witch, Evelyn's fondness for you +10 points, and unlocked the fire element 10 fold attack.

You gained 100 points of experience from the witch of the storm, Taylor's fondness for you +10 points and unlock the windstorm tornado.

The witches were not only beautiful but also sexy and charming. Each of them could destroy the world.

As their host, Andrew was busy making love with them every day.

Andrew had become a unique existence in mage. When others were still diligent in their study, he had become a big tutor mage that everyone admired through breeding witches.

When he became the public enemy of the aristocrats on the continent, all the witches destroyed a country, and he became the supreme god of the world of magic!

One sunny day, Shen Jingwei, a Z-list actor, received an opportunity to attend an open-call audition the very next day.It was for the role of an antagonist in a new BL C-Drama, “Dance Of The Dragons”, which was adapted from a novel of the same title.He agreed to join the audition due to several factors, among which his manager's threat to jump off the 20th floor, his dire need for money, and also the fact that his rank in the film industry could not go any lower.One look at the panel of judges made him want to turn on his heel to leave, but it was all too late.Because who would expect the poor Z-List actor to meet his mortal enemy/ex-boyfriend, Yan Renzhong, the A-List Actor responsible for his decline long before he even learned how to fly?------------------“You and I... are playing a couple of lovers, who will go on to get married and have children with each other.”Shen Jingwei could sense blood coming up his throat.What was the point of saying it out loud, again?“Yes,” he forced himself to agree nonetheless.Yan Renzhong pinned him with a stare.“We have unresolved issues from the past. I hope you won't let them affect your and my performance in the drama. Act the professional you are supposed to be.”“...”“And don't call me 'Emperor Yan' anymore.”Yan Renzhong left after delivering one blow after another, not even waiting to see if Shen Jingwei succumbed to his injuries or not.What?Whattt?Whattttttttt?