Light Novel Volume 25

Yggdrasil of the Summer Courses is the twenty-fifth and final novel of the High School DxD series. It is the fourth novel of the Red Dragon Emperor of the Blazing Truth × White Dragon Emperor of the Morning Star: The True Dragon(s) of the Kuoh Academy arc.

Chapters

 * Transcendental reason.
 * Life 0.
 * Life 1. Female Teacher formal marriage interview
 * Life 2. Milk Sea and Maou "Game"
 * Balberith and Verrine
 * Vidar
 * Team member 1.
 * Life 3. Battle in Yggdrasil
 * Life. DxD vs Life. GOD Red Dragon challenge the Gods
 * New Dark. From outside of the World
 * Longinus
 * Qualifying Team
 * Teams participating in the main event of First Rating Game World Tournament "Azazel Cup"
 * Gods of Hell
 * Team Member 2
 * Next Life
 * Afterword