MTL - Marvel: Start with Summoning the Shadow Troopers - Chapter 270

Kenji’s life was hard. During the day, he worked in a bookstore. At night, he served ramen. He did it all to take care of his family. His mom was sick and needed medicine, and his little sister needed money for school. His best-paying gig was working for a mysterious author, illustrating the manga for a popular web novel. There was just one problem: he hated the story.He was in the middle of drawing the academy arc when his frustration peaked. The story’s villain, a rich kid named Azrael Ashveil, was weak. He made dumb mistakes and died unfairly. Kenji thought the character deserved better. After finishing a panel showing Hero's Victory, Kenji collapsed from exhaustion.He wakes up not in his small apartment but in a fancy bed with silk sheets. Looking in the mirror he sees the handsome, violet-eyed face of Azrael Ashveil. He has entered the story he hated and is now the doomed villain.Worse, he's arrived late to the party. The original Azrael has already made a mess of things. The story's golden-boy hero, Kaelen, already despises him. His beautiful wife, the half-elf heroine Elvara, is terrified of him. And all of his death flags-the events that lead to his execution are right around the corner.Azrael must use his knowledge of the future just to stay alive. Can a minor villain with no power of his own really change his fate, or will he just find a new, even more tragic ending than the one he was trying to escape?

Han Yoona, reincarnated into the novel 'The Golden Heir' as the heroine of the novel and she lived her new life without complaints… until she’s killed.Her story should have ended there, but Yoona’s soul wakes up in the body of Luzia de Cazadores, the daughter of the kingdom’s most feared villain, Duke Ramiro de Cazadores.Yoona expects a cold, calculating tyrant. What she gets instead is something entirely different.“The author left out crucial details. Too many.” Yoona thinks, trying to figure out how he became the feared villain of the kingdom.As she gets to know Ramiro, she begins to realize that everything she thought she knew about Ramiro might not have been the full story.“Alright then, forget the plot or trying to rewrite everything. I’ll just grant the original Luzia's wish…”But with rival nobles plotting against them and the kingdom still fearing Ramiro’s so-called villainy, To protect her new family and escape the traps of a story she thought she knew, Yoona must outwit it to prevent the original story's outcome.

Others treated disease to save person, he treated disease to steal heart.

The Frost Goddess was deeply captivated by him. The gentle and kind beautiful teacher was completely enchanted by him. Even the cold and beautiful female assassin melted quietly because of him.

Competing in medical skills? He was the one who treated the Godly Doctor. Competing with backgrounds? Leaders rushed to him. What? You actually wanted to compete with him in a match for match? Looking at the gentle girl beside him, Tang Yu had a headache as he said, “Beautiful girl, how did you fall in love with me?”

- Description from Novelupdates

A broken man who ended his own life finds himself reincarnated into the game he used to play. However, instead of becoming the protagonist or a powerful antagonist, fate places him in the role of a minor villain—a mere stepping stone for the protagonist in the game's first arc.