Light Novel Volume 9

School Trips are a Pandemonium (ハイスクールＤ×Ｄ９ 修学旅行はパンデモニウム) is the ninth novel of the High School DxD series. The novel covers part two of the Heroic Oppai Dragon arc.

Chapters

 * Life.0
 * Life.1: Yeah, Let's Go to Kyoto!
 * Life.2: Arrival at Kyoto
 * Life.3: The Group of Heroes Has Arrived!
 * Life.4: Showdown in Kyoto! Gremory Family vs. Hero Faction!
 * Maven.
 * New Life
 * BossxBoss.
 * Vali Lucifer.
 * Bael.
 * Heroes.
 * Afterwords

Returning characters

 * Issei Hyoudou
 * Rias Gremory
 * Akeno Himejima
 * Asia Argento
 * Yuuto Kiba
 * Koneko Toujou
 * Xenovia
 * Irina Shidou
 * Rossweisse
 * Azazel
 * Genshirou Saji
 * Yura
 * Momo Hanakai
 * Vali Lucifer

New characters

 * Georg
 * Heracles
 * Jeanne
 * Leonardo
 * Sun Wukong
 * Yu-Long
 * Kunou
 * Yasaka
 * Le Fay Pendragon
 * Gogmagog