Light Novel Volume 12

Heroes of Tutoring is the twelfth novel of the High School DxD series. It is the last novel of the Heroic Oppai Dragon arc.

Chapters

 * Life -3: A Gremory without Issei
 * Life -2: Pal
 * Life -1: The Alliance of Young Devils!
 * Life 0: The Breast Dragon Emperor
 * Life 1: Crimson Promise
 * New Life