Azure Chronicles: Ēterukurosu

After the defeat of the 20th Demon King, the constant wars between the Demon King's army and the rest of the world came to an unexpected end with the 21st Demon King.

Millenniaslater in a quiet remote village by the sea, lives a certain individual; however, despite being a famed hero for defeating many Demon Kings, Xiavion "The Wandering Accumulator" or "The Lord of Accumulation" spends his days researching any subject which comes his way. Despite living in the middle of the village, he still manages to be a recluse, but if you asked his neighbour Naviya she'd say Xiavion is just shy.