The Brilliant Healer's New Life in the Shadows: Volume 6 (Light Novel)

Zenos and Lily succeed in founding St. Carmilla Academy, the first-ever school in the slums, with help from noble children. There, the shadow healer meets Roa, a young girl with big dreams of adventure and bold claims of being the daughter of the former Sword Saint. When Roa runs into trouble, she finds herself face-to-face with the current Sword Saint and vows to become her apprentice. Between this fateful meeting and a certain meddling wraith pulling strings, Zenos is drawn back into the adventuring life he thought he'd left behind.