I’ll Resign And Have A Fresh Start In This World

The main character, Cho Isu, lived an ordinary but happy life.
Five years ago, he suddenly loses his parents, and becomes a devastated man, as he struggles every day.
When he was exhausted from the suffocating daily life, a portal opened in the room. A place he has never been to, a place he doesn’t know what might be.
A healing life to enjoy in a different world starting as a commoner and turning into a feudal lord.