Old Kensei rejuvenates and becomes an instructor at a knight training school

　Seventy years have passed since the war that lasted a hundred and thirty years stopped. At that time, Alain, who was touted as “Kensei”, was spending his life alone in the mountains. One day he was asked by a messenger from a certain country to raise a knight. There is a sign that the world's military power will be out of balance and another war will start, so he will prevent it by education. Sometimes the condition required for that education was to make them ten times stronger in half a year ...