MTL - Self-cultivation of Male Supporting Role - ~ Work related

She is the slow-witted idiot of the Prime Minister’s Residence. Everyone bullies her. He is the most respected and unfeeling Prince, with frightening ability and absolute envy! Together, they are conferred an imperial edict of marriage.

She acts stupid and tries to decline in every way possible while he despotically escorts her into the wedding…… everyone ridicules the match, but no one knows that the “idiot” has transformed from a loser into a talent.

After the marriage, when they encounter the Empress Dowager examining the room, they act in concert with each other and pretend to be two mandarin ducks deeply in love. Afterwards, she laughs, “The performance has ended. Your highness, please return.”

He laughs softly, “Since you’ve got onto this Prince’s bed, don’t even think of getting off.”

- Description from Novelupdates

I reincarnated inside my favorite eroge—as the main villain. But this time, I won't die like a disposable side character.Gifted with an SSS-Rank Taming System by a wickedly beautiful goddess, I’ll turn the heroines of the “main characters” into mine.One by one... they’ll kneel, obey, and crave me instead.---Check out my discord for character illustrations: https://discord.gg/Z9pY9tE9e8(No Yuri/No NTR)

Excerpt:“Are you satisfied?” he asked, walking to the fire where she already sat. “Can you yet call yourself the greatest knight?”“Not until I can beat you,” Irene argued.Despite how serious he looked only moments before, he cracked a smile.“But you saved my life,” he insisted.Synopsis:With a second chance given to her after a pathetic ending to a life she didn’t want, Irene Litharion decides that she will follow in her father’s footsteps and become a knight.Waking up in the body of her eleven year old self, she’s reinvigorated to follow her heart. She has the rare blood of ancient warriors in her veins and promises to not turn her back to it anymore.Prepared for the sacrifices she will have to make to live the life she wants, a new challenge is presented when the only way she can become an apprentice knight is to turn her back on femininity altogether. The years she spent being forced to attend etiquette lessons go out the window and instead, daily sword practice takes place.Her father does all he can to get her into the knighthood, but it’s up to her to show her strength and skill to stay in it.However, it’s different than she expects when the Monster War ravages her homeland, she learns the sting of loss, and secrets of her own blood present themselves the more she leans into the thrill of battle.

After being killed, Xu Turan was given a system and got pulled into a certain thriller romance novel. There, she became the crucial female supporting role who seeks death. However, on the first day of transmigrating, her system was urgently recalled for repair as it was aging.

As their farewell was imminent, the system was worried about its new host so it repeatedly reminded Xu Turan: [Your role is to be a supporting character who is always seeking death. You do know what that means, right?]

Xu Turan recalled her rich experience of doing just that in her previous life and she replied affirmatively with absolute confidence.

So the system withdrew with its mind at ease.

After a few days, the system that had been away for repair finally returned. When it looked at the situation, it almost malfunctioned: [What are you doing?!!]

Xu Turan, who was busy arguing with the Evil God, answered without thinking, “I’m doing what you asked me to do – trying to find ways to die.]

System: […?!]

- Description from Novelupdates