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

It was to be expected that Ren's popularity received yet another surge in the next few days. And the little girl he had saved had no clue how much she owed to Ren! However, she did know that this good looking big brother had saved her life, so when Ren and Fang appeared at SIMS the next morning and went to visit Tom and his daughter, she said sweetly, "Big Brother Ren, thank you!"

Ren smiled at her and asked gently, "How are you feeling now? Any discomfort?"

The little girl frowned. "My head is a little itchy, but that's all," she said.

Ren quickly checked her once and found that there was nothing wrong. He passed a tiny little spark of magic into the little girl to make the itching stop.

"The itching will stop by itself, there's no need to worry," Ren told her with a gentle smile. "You will be perfectly fine very soon, and then your Papa can take you home."

108 – Fang Has Doubts