Gekitotsu no Hexennacht - Volume 1, Chapter 15: There Lies a Rebuke

Han Yun was spoiled from childhood.

He survived past his emperor dad and crown prince elder brother, and became an emperor.

He didn’t know how to govern the country, but he was lucky—there was a Grand Preceptor who “assisted” him, spoiling him even more than his father did.

After just a few years, this puppet emperor died. When he awakened, he had transmigrated into the modern world, becoming a third-rate model struggling alone without any loving parents.

Just when he thought he had become a little cabbage that nobody wanted and no one would ever spoil him again, a certain ancient monster of a Grand Preceptor who had lived 1,000 years appeared again… and looked to be doing quite well for himself.

The utterly impoverished little emperor had tears in his eyes: “Beloved subject! Zhen (royal We) have missed you so much!”

Grand Preceptor: “Your Majesty, this minister has waited for you for a thousand years.”

- Description from Novelupdates

What would you do if you were to wake up one day to the message?

[You have 5 days until the next full moon]

[Your bloodlust is increasing]

Gary Dem is a person with a secret. While coming back to school appearing as a whole new person, he does everything he can to keep this from the people he cares about. For his path is one that led him to become part of the underworld.

The world has changed, and gangs rule the streets sponsoring big corporations. Bribing politicians behind the scenes and controlling the decisions people make without them knowing it. Using a new breed of humans called the Altered, a mixture of man and beast.

It was only meant to be a side job, he was never meant to dig in too deep, but on a mission for his gang, something went wrong, something changed him.

[You have 5 days until the next full moon]

[Your bloodlust is increasing]

The lone wolf… is about to go on a hunt!

Traversing to Naruto World on Monday, as long as you sign in, you can get the other party’s ninjutsu, ninja tools, and bloodline boundaries. After the good impression is full, there are all kinds of surprises!

Kai: Where did I go to this kid to learn Bamen Dunjia!

Obito: Damn, how can this kid be so powerful!

Nagato: Shinra Tianzheng! Are you interested in going to Konoha for a double yellow bullet?

Hashima: Come on boy! Thousands of hands beat each other!

At this time, Monday stood in front of Kaguya Otsutsuki with a charming smile.

Kaguya will sign for me.

- Description from novelbuddy

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.