Berserk is a dark fantasy manga written and illustrated by Kentaro Miura. It tells the story of Guts, a lone swordsman who wields a giant sword and travels a world filled with demons and monsters. Berserk is known for its extreme violence, gore, and sexual content, and is therefore rated 16+. However, it is also acclaimed for its complex characters, story, and artwork, and is considered one of the greatest manga ever written.