Timeless Treasures

The Soundtrack for the fantasy novel Timeless Treasures which has been translated into 9 languages and is popular on overseas web novel submission sites. It is the work of novelist and musician Kazama Sumi.
(Synopsis)
An adventure fantasy story in pursuit of hidden secret gold and silver treasures!
During the Age of Exploration, it is said that a huge amount of gold and silver treasure was secretly accumulated through trade with foreign countries, and that it was hidden away!
High school student Souma hears a rumor that a stone with a mysterious pattern carved into it has appeared in a pond, and goes to take a look.
The history club teacher tells him that it may be a stone that indicates the location of treasure.
The villainous treasure hunters who are trying to find that treasure are secretly at work. Then, Souma and his friends obtain a secret ancient document, slip back in time, and become involved in the incident.
This is a battle story with a total of 12 episodes based on the original work.