Level Swordsmanship

How should one 15 year old react to his mother dying in a war? There is no simple way to put it. His mother left an honorable legacy to fulfill, and Kenji is going to fulfill it. With the work of teammates and the swift power of magic by his side, he will find a way to defeat even the strongest of demons or the most powerful of gods. Kenji is going to avenge her at all costs.