No Cheat in Bleach ? Watch me help Aizen then. - Chapter 100: Mass Hollowfication: Aizen and Kisuke’s First Clash

Regaining the memories of his previous life, Cyril realised that he was an otome game’s character, the villainous daughter– Sophia’s butler.At the rate things were going, Sophia would eventually have the prince stolen away from her by the heroine, fall into darkness, and be executed.Wanting to save the villainous daughter he was so fond of, Cyril moved to eliminate all the factors that would cause her to fall into darkness, raising her up to be a talented and beautiful girl who could win the prince’s love, however…

One morning, after being bound to the system, MC started his routine of always being captured/ attacked by the ML.

It doesn’t matter if he transmigrated into the ML’s little brother (TN: Here I think brother disciple) or master or opponent, but in the end he is still forcibly taken by the ML.

After transmigrating to many worlds:

MC: Come out system!!! The heck?! Why do these MLs not love their female goddesses, but insist on doing it with me! Aaaaahh!!!

System: …. __(:3」∠)_ Don’t ask me, I also don’t know.

- Description from Novelupdates

Ren Kuroda, a college student and hardcore gamer, finally conquers Eternal Souls: Last Judgment, an unbeatable RPG, only to be met with a strange message on his screen.“Congratulations, Champion. Would you like to unlock the bonus stage?”When he clicks “Yes,” he is transported straight into the game world, reborn as Terence Ross, the overlooked third son of a minor noble family. Realizing he’s just an extra in a world teetering on ruin, Ren trains relentlessly to survive the coming chaos.However, life wasn’t smooth sailing.He was soon engaged to Lilith Underwood, the girl destined to become the game’s final boss, the Third Great Calamity. To avoid her devastating future, Ren takes a risky approach, trying to make Lilith emotionally dependent on him in the hopes of anchoring her humanity.Yet, his plan backfires spectacularly. Lilith’s attachment becomes a fierce obsession, one that could be just as dangerous as her dark powers.Now, as doom inches closer, Ren faces a double-edged crisis. He must keep Lilith’s powers in check while somehow surviving her unrelenting need to keep him by her side.In a world where even heroes fall, can an extra rewrite his fate? Or will he be claimed by the calamity he tried to prevent?

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