A Tale of the Secret Saint, Volume 4 (A Tale of the Secret Saint #14-18)

As the knight brigades patrol the forest, a pair of blue dragons has pinned one of the companies, and it's not looking good! When Fia is the target of a deadly attack, Zavilia steps in–and up–revealing his adult black dragon form to protect her. He may have shown their hand, but there's nothing this dragon wouldn't do for his savior.