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

Before Ren and Fang could call Pax, however, Pax had already called them.

"I'll handle it," Pax said, even before Ren could start speaking. "I'll come by to your place in an hour or so. You can go ahead to SIMS, Ren. I'll borrow Fang for today. Don't worry, I'll keep him protected and I'll not let anyone outside catch even the slightest glimpse of him."

Ren chuckled. "All right, then," he said. "I'll entrust my little darling prince to you, then."

"Don't treat me like a swooning princess that's always like a damsel in distress and needs to be protected by you all the time," Fang said crossly.

Ren laughed and caressed Fang's beautiful face. Fang had already grown taller than him.

"Who's calling you a damsel in distress?" Ren asked, adopting a cajoling tone of voice. "You are my prince charming – quite literally now."

157 – The Dragon Queen Makes A Move