Endro~!

Naral Island is a mysterious island that's hard to call either small or large, and there are many unexplored regions sleeping within. Yet the Hero's sworn friend and famous supreme Cartado Master, Mather Enderstto, was another who was intrigued by such unexplored regions. However, she ultimately managed to discover one. Yes, the forbidden land where the secrets of Cartado lie... That was the beginning of her adventure into the taboo.

A Hero's Party always needs someone to maintain harmony amongst the group in addition to their leader. For example, in Yusha's party, Seira - or Ellenoar Seiran - served in this role. With her diligence and common sense, Seira was a key pillar of their otherwise freewheeling party. This particular tale is one of the priest Seira's lonely battle as she stood boldly against a threat that could have ruined their party... 

After defeating the Demon Lord, one Hero left this statement on record: "If the Demon Lord were pure evil, then we wouldn't agonize this much over what we've done." The Hero and the Demon Lord, two who are destined to fight. However, if there were some justice to the Demon Lord's actions, then would the Heroes still be able to brandish their swords? And what on earth is the Final Dead End that holds the key to everything?

The resurrected Demon Lord finally appeared before Yusha, Seira, Fai, and Mei, so the four set out for Demon Lord Castle to save their kidnapped friend. However, during their travels, the young girls learned the truth about the Demon Lord. Demon Lord or friend? The four girls set forth, still deliberating over that unanswered question, together with the precious companions they knew they could trust no matter.