Yashiro, working with Jogamine, defeated Ido. Indou and Sarah also eliminated the remaining Nephilim, bringing the party's turmoil to an end. However, Lord Storm's Coffin, who disappeared during the battle, remains missing. The identity of the mastermind who ordered Ishinoo's assassination also remains unknown. A shocking event that befell Jogamine after the battle has created a new mystery. What did Yashiro's mentor, Takamiya Kiyoto, do to his daughter? Indou's past is also revealed, and the story moves to the next stage.

After reuniting with Martha, Yashiro and his companions decide to stay at the Hero's Hot Springs. The innkeeper, a "priest," seems to be a dangerous character with many quirks. Martha suggests to Yashiro and his group that they attack the castle that Lord "Starlight's Veil" has as his base. Lord "Starlight's Veil"'s castle is said to be a den of monsters that once annihilated the mercenary unit "Northern Bonfire," which had trained Indou. An unexpected person awaits Yashiro and his group during their strategy meeting.