I'm a new writer, so I can't write a good blurb.
Please note that the second protagonist doesn't appear until later.
After outgrowing his edgy phase, Jun Xingchen encounters the System he used to fantasize about during it.
On impulse, he binds himself to the System, only to find out that it's the legendary useless System, completely incapable of helping him.
Luckily, he has a learning space. He can't count on the mountains or the System, so he rolls up his sleeves and works hard. As long as studying doesn't kill him, he'll study himself to death.
This novel is also called: The Quick-Transmigration Overachiever and His Useless System.