Hikyō Tanken Famu to Īrī

Long ago, a powerful magical civilization flourished. Its expansion into the world was abruptly interrupted by a terrible war that ended with all its former glory. As time passed, history became legend, and the people forgot the magical powers that once dominated the world…

But not everyone ignores the past. Some, such as Ihrie and Fam, dare to search the forgotten ruins of the lost traces of magic. Adventurers such as they are called Ruin Explorers…

Links:

• Author's Twitter
• OAV on ANN