Overgeared

From Yen Press:
Youngwoo Shin is a deadbeat in real life, working odd jobs to barely pay off his loans. Even his family has written him off as a hopeless video game addict. But when he logs in to the massively popular VR game Satisfy, Youngwoo becomes Grid the Warrior…who is also painfully mediocre. Everything changes when he stumbles across a tome containing the lost knowledge of a legendary blacksmith. The catch is, using it resets all his levels! In order to survive after being forced back to square one, Grid will need to hone his skills and gather reliable allies or not! Who needs all that when you're decked out in god-tier items?