The Witcher: I Have a Witching Manual

As soon as he opened his eyes, Rose traveled to a fantasy world. Bad news: He's become a precarious apprentice witcher; Good news: He also comes with an adventurer's manual. As long as you kill monsters, you can obtain various specialties, and you will receive various special rewards for completing tasks; ........... Many years later, the Scarlet King, the leader of the demon army that invaded the virtual realm, frowned when he heard the battle report brought by his men. "You mean our army was wiped out, and the other party... Only had one person?!" (Non-Wizard fan)