In the Second Generation of the Trench, He Changed To the Ruanfan Script - Chapter 54:

Karl Adelheit, a self-proclaimed ordinary student returning from military service.

And a nobleman who enlisted as a soldier and received Medals of Honor.

Cote: There is Something Wrong With HikigayaBy: XiaokoPatient Profile:Patient: Hikigaya Hachiman, Year 1 Class D, Tokyo Metropolitan Advanced Nurturing High SchoolDiagnosis: Adolescence SyndromeCondition Overview: The patient claims to have woken up in a parallel world, where both his physical age and relationships have drastically changed!Yukinoshita Haruno is now his classmate.Shizuka-sensei is somehow teaching at Sobu Middle School...And before he knows it, he ends up in a prestigious school with a 100% graduation and employment rate, stepping onto a fate that even destiny itself cannot predict!

Shao Xian went back in time to when he was ten years old and met his pitiful old enemy. He wanted to personally train him so that when the other grew up, he wouldn’t turn against him.

But he didn’t expect that this old enemy would turn sweet and sticky after being taken care of.

It was just that this little sweet cake was too insecure and often, golden beads of tears would drip.

As soon as he cried, Shao Xian was helpless, and of course, he would want to give him everything.

—

On the way to an auction, Shao Xian died in a car accident.

Before he died, he thought, Fu Baizhou must be very pleased without him being present to mix things up.

After all, in Yan City, Fu Baizhou shocked everyone with a name of being cruel and ruthless.

Only one person dared to confront him.

When he opened his eyes again, he was wearing a custom suit, reexperiencing his tenth birthday.

He saw a dirty little boy being ridden on like a horse. He suddenly remembered the rumors that had been circulating widely in his previous life. It was about the tragic childhood of a ruthless man surnamed Fu.

- Description from Novelupdates

Transcend to become the prince of Daxia, activate the Devil Emperor Summoning System, summon the powerhouses from other worlds, and fight for hegemony in the heavens!

If I were the Devil Emperor in the future, I would definitely let your blood stain the sky!

- Description from novelbuddy