Jaywalker_Holmes

Ren, a modern doctor and a secret master magician, suddenly finds himself inside a random book he picked up at the airport...as the villainous older brother of the protagonist. As the bad guy, he's supposed to make life difficult for the Male Lead until the latter grows up and kills him in revenge. However, looking at the broken teenager in front of him, Ren can't help but feel his heart soften. 
Fang was an orphan who had never known what a family is. Abandoned at birth, all he knew was pain and fear. He loved nothing, and wanted nothing...until he saw the angelic Wade. To save Wade, Fang didn't hesitate to sacrifice himself. ..after all, there was no one to cry over him.
But then, Ren appeared and turned his world upside down.

The Villain Saves the Male Lead

After the debacle with the King of the Dune Country, no one bothered Ren and Fang for several months. Fang was able to take his exams in peace and got the top national rank, which resulted in a another ruckus caused by the universities clamouring to woo him.

However, Ren's security was watertight. Except for emails, he'd left no ways for anyone to contact Fang! So, while people on the outside were biting off their fingernails in anxiety, Ren and Fang were in a nice, relaxed world of their own, not doing much except playing with the babies! Ren had managed to beg for some time off from Pax and the little family was off vacationing in Dragon Nation in the nice villa Ren had bought.

Ren wanted to advance everyone's magic before they got busy again, the air of their villa in Dragon Nation was just perfect for this.

Thus, Ren and Fang advanced rapidly, and Ren's physique improved as well.

92 - Coming of Age