(From Kadokawa Shoten):
The self-proclaimed Angel, Irina, will make a miracle happen on Christmas Eve!
Because of a consultation about Christmas, Issei and co. ended up going to Heaven. During such an event, an incident occurs in which exorcists begin to die continuously in a strange way. It turns into a huge incident which drags Irina into it...... The self-proclaimed Angel will use her wings to fly!
- Life.1 The Devils Also Celebrates Christmas!
- Life.2 The Forbidden
- Life.3 D×D Also Launches To the Heaven!
- Fake Hero.
- Life.4 Burn, Holy-Sword!
- Next Life.
- Boss × Boss.
- Ashes to ashes, Dust to dust.
|Main Characters||Returning Characters||New Characters||Antagonists|
- "Please give me the power to save my Dad.....to save everyone.....!" - Irina Shidou
- "So you must be Irina's father. Indeed, you certainly do resemble her." - Xenovia
- "We will now announce the new President and the new Vice-President of the ORC." - Akeno Himejima
- "I don't mind dying for my comrades. Though I won’t get killed without putting up a fight." - Yuuto Kiba
- "I do feel bad for using up Ise-sama's private time as his manager, but this is all for Ise-sama!" - Ravel Phenex
- "If we don't take back Agreas, the Underworld will be in midst of chaos. Something which can cause that to happen is in there." – Maou Sirzechs Lucifer
- "I-I know about it! For X-mas in Japan, you have to give yourself to the man you have a liking to as a present!" - Asia Argento
- "The Heaven will use those techniques to make the baby-making between Angels and Devils possible!" - Azazel
- "Ufufu, everyone. For the great Christmas strategy, please do your best." - The Most Beautiful Woman in Heaven, Seraph Gabriel
- "We will be giving out presents during X-mas together with the Angels." - Rias Gremory
- "Santa won't come to erotic children." - Koneko Toujou
- "I see, so you prefer a Santa with a short skirt, Ise-kun? I see....." - Rossweisse
- "This sure is interesting! Your destruction and my barrier, let's have a battle to decide which one is stronger!" - Evil Dragon Ladon
- "The circumstance this region had in the past, it seems like it is deeper than we can imagine." - Sister Griselda
- "It has been a while, Lilin. —I won't show mercy to you." - Chief of Angels, Michael
- 《Bring it on! I will even take on close-combat! Except, don’t think you will be fine after this!》 - Gasper Vladi
- "Fight me. I may be able to find the future that the Dragons must head to after defeating you." - Evil Dragon Crom Cruach
- "I'm someone who has fallen once already. It will be too early for me to be stand up once again. —But I sure would like to fight you again, Hyoudou Issei. But before that, I'll just have some fun with the Evil Dragon hunt." - The Vanguard of Sakra, Cao Cao
- "I can't allow you to do as you like any further than this. Well, I am the leader after all." - Joker Dulio
- "Ufufun♪ It sure seems interesting！To be able to burn an Angel with my Cross!" - Purple Flame Walburga
- "Our souls will be saved if we kill all of you! Now then, disappear, Supernatural Beings that have formed an alliance in this cursed town!" - The Avenger that carries the Ame no Murakumo no Tsurugi
- "I won't allow you to kill my Dad, and my comrades! So please lend me all of your strength! My new power! And also Xenovia, Asia-san, and Ise-kun!" - Michael’s Ace, Irina Shidou
- "Uhyahyahyahaya! Dance, and dance more. Seriously, the Devils and the Heaven sure are carrying quite a nuisance with them♪" - The Leader of Qlippoth, Rizevim Livan Lucifer
- "I think I finally came to understand his, Vali's.....feelings. You are the one person I can't forgive. Rizevim, I will knock you out!" - Sekiryuutei Hyoudou Issei
- Volume 18 currently has the least amount of illustrations among the books in the High School DxD series.
|The Red Dragon Emperor's Awakening|
|1 • 2|
|Birth of the Breast Dragon Emperor|
|3 • 4 • 5 • 6|
|The Heroic Oppai Dragon|
|7 • 8 • 9 • 10 • 11 • 12 • 13|
|The Legend of Oppai Dragon and his Lively Companions|
|14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22|
|Red Dragon Emperor of the Blazing Truth × White Dragon Emperor of the Morning Star: The True Dragon(s) of the Kuoh Academy|
|22 • 23 • 24 • 25 • True 1 • True 2 • True 3 • True 4|
|1 • 2 • 3 • 4 • 5|
|EX • Zero|