Naruto System in One Piece - Chapter 6: Massacre and Counterattack

The strongest wizard Alfred, in a hero’s party, subdued the Maou and in the process took a cursed arrow to the knee.

Even with the hurt knee, Alfred’s still the strongest wizard ever. So…

「We need a chief for our newly created knight squad!」 「Could you help us as our guild manager?」「We need someone to rid us of the dragon that resides in the North Mountain!!」

Alfred just wanted some time to rest and recover, but no one would LEAVE HIM ALONE!

Because of that, Alfred wished to spend time recovering in a small country village that no one knew about.

『Need a guard in Mulg Village. Wolves and boars attacking the village. Payment is food and board. *Village has a hot spring.』

「THAT’S THE ONE!」

So, the strongest wizard in the kingdom…decided on living the slow life in the country.

Kira was living the life that others could only dream about. He was gorgeous, rich and very popular - the kind of guy that drew students from all over the place just so they could brag to others that they went to the same school as him. He was undoubtedly the number one heartthrob that every girl dreamed about.

After his death, Bern awakens 10 years into the past as the third prince of Kailis, the enemy country.