[mickbis]

Originally Posted by Ramero

It looks like impossible to travel through time while summoned from different world..

From what I read ( google translate )

Spoiler for Ninja part in vol 2:

Ninja first generation entire village got summoned to this world several hundred year ago
They have no way to go back so they continue their way in new world as an assassin for noble who willing to employ them
They said to Ryouma how people from the Japan ( using old Japan name ) that got summoned later on forgot the fighting way and one of them show interested in Ryouma and his skill in combat
In the end, they believe that Ryouma might be the one to change their fate which also depend on the result from the civil war in Roseria Kingdom (at the end on Vol 2)