Second season of .

A class of Japanese youths volunteer for the war effort during WWII, but then get stranded in Manchuria.

An ordinary and unlucky high school student, Lu Mingfei, one day received an admission letter from Kassel College, a foreign private university. After hesitating and hesitating, Lu Mingfei decided to find out. So far, he has stepped into the world where the "Dragon" exists, his life has undergone earth-shaking changes, and he has embarked on the journey of "slaying the dragon".

When swords were outlawed in the eleventh year of the Meiji Era, the mighty samurai population began to dwindle. Those who rejected the ban on blades rebelled, causing violent unrest to erupt throughout the countryside. To combat the rise in criminal activity, an inescapable lake prison was constructed. Three young men, born of the Kumoh line, were given the duty of delivering criminals to their place of confinement—but could there be more to their mission than meets the eye? (Source: FUNimation)