Male God's Comeback System

When would you most want to go back to?

Han Cheng, a grown man who'd achieved nothing, was hit by a car and killed while saving a child. After he was reborn, he discovered he'd returned to his five-year-old self. He also found that he now had a System and a personal space.

[Didn't you say you wanted to learn some things to protect yourself? I've got everything here, so what are you waiting for? Go learn!]

"Aaaah! Let me finish this chapter! Just one chapter!!"

[No! If you don't start studying right now, you'll be punished~]

"I suddenly feel full of energy! Let's go right now!"

I started this story because of my own troubles. I want to do so many things, but I put them off and eventually give up. By now, I've started to question my own worth. Then I thought, if a System showed up and helped me get rid of some bad habits and study hard, would I become a different person? The time I'd most like to go back to is when I was five or six.