Returning to life again after four hundred years, Kashimo at first did not pay attention to the changes in the world, but when the realization that he had to live another whole new life washed over him, he realized that he knew nothing about this world. You were the one he asked to tell him everything that had changed since the Heian era

“Are you saying that this thing can do so many things?”

Kashimo showed you the smartphone, not even knowing how to unlock it