Synopsis

The chapter follows the group as they descend into a hidden chamber, where they encounter an ancient mural depicting a demon realm sword alongside the flute of the heavens, leading to questions about their connection and the origins of the protagonist's own sword. They discover the flute, an item from their heritage, hidden in a box, and when the protagonist plays a basic tone on it, a spirit emerges, entrusting the flute to him. A prior guardian who was guarding the chamber then vanishes.