Negima: Master Negi Magi Vol. 13 GN

By Ken Akamatsu.

As the "Budokai" Martial Arts Tournament draws to a close, Negi finds himself facing one of his own students, Setsuna, in battle. But after the strange disappearance of Takahata-sensei, and an even stranger conversation with the mysterious "Ku:nel" Sanders, can Negi pull it together to emerge victorious?

Elsewhere, student Asuna leads a group of rescuers - among them another student of magic–deep into the catacombs beneath Mahora Academy. Who will receive the greater shock: Asuna in the depths below, or Negi facing his long-lost father?

For age 16+. English manga graphic novel.