Isekai Guild no Berserk

Isekai Guild no Berserk (異世界ギルドの英雄師弟〈ベルセルク〉) is a light novel series by Hajime Asano with illustrations by Senmu.

Plot
After losing his life in an accident, Kazuma Tonomura was reincarnated into Kyle Kruger; the sole apprentice of Azusa Kruger, the legendary adventurer who once saved the world. Now the time has come for Kyle to adopt an apprentice of his own, except that one of the candidates named Tachiana can't even defeat a monster.

Official

 * Official Home Page