(BL) Quick Transmigration: Homewrecker System! - Chapter 15 - 1.14

Julietta, born as an illegitimate child of a nobility, is raised in an opera theatre to hide away from the eyes of the noble’s main wife.

Choices. Crossroads. Opportunities.Plunged into a broken world ruled by the strong, Damien must decide how his newfound life will proceed. Navigating through conflicts and alliances, his journey intertwines with the fates of powerful figures and kingdoms, challenging the very fabric of the hellish world.Set against the backdrop of the legendary One Piece universe, this tale reimagines familiar characters and lore, weaving a narrative that explores themes of power, redemption, and the indomitable spirit of adventure. Damien's quest is not just for treasure or glory but a deeper pursuit of a truth that could change the course of history.As the tides of the Grand Line shift and churn, Damien confronts the harsh realities of the pirate world, facing challenges that test his limits and forge his legacy. In this saga of the high seas, only the bold dare to dream, and only the strong survive. Will Damien rise to become a legend among pirates, or will the unforgiving waters claim yet another soul? The journey to discover 'One Piece' is as perilous as it is wondrous, and for Damien, every choice and battle is a step closer to his ultimate destiny.Join him as he goes against all odds in the world of Pirates, Marines, and Revolutionaries, sailing on the Path to Power!

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

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates