As A Cardinal, I Don't Do Overtime - Chapter 25

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

Yu Ziyou and Zhong Wan served different masters.

They had once been the closest of souls, and were the bitterest of enemies.

After losing the fight for the throne, Zhong Wan brought his two young masters with him far toward the borders for the sake of survival. He relied on the little friendship that existed between him and Yu Ziyou when they were young. He borrowed some of his personal belongings while also dropping various hints around which made everyone think that there was something intimate going on between them.

Given the Yu Clan’s powerful authoritative presence in the imperial court, this appearance of a close tie allowed Zhong Wan to live a much better life than before. As such, the stories he cooked up began to carry more and more weight.

As rumors of their lovely romance spread a thousand miles into the horizon, Yu Ziyou, who was located in the distant capital city, eventually caught wind of his deeply moving and epic love affair. In a trance, Yu Ziyou, who had been completely brainwashed for seven years, believed in them. He guessed something special really did happen between them back in those years…

- Description from Novelupdates

The year 1847