Manga Volume 4, High School DxD Wiki

The fourth volume of the High School DxD manga was released by Fujimi Shobo on January 9, 2013 under their Dragon Comics Age imprint. It covers the fourth and final part of the Red Dragon Emperor's Awakening arc. 17. "The Showdown Begins!" 18. "I'll Enchant You With My Finishing Technique!" 19. "Combine the Power of the Two!" 20. "I Can StillFight!" 21. "I'll Taking Prez Back!" 22. "I'll Blow Away the Immortal Bird!" 22.5. "I Start a New Life" Issei Hyoudou Ddraig Rias Gremory Asia Argento Ko

Ani-Imo - Wikipedia

Four Great Satans, High School DxD Wiki

Aika Kiryuu

File:DxD v17 273.jpg - Baka-Tsuki

Daily Lives of High School Boys - Wikipedia

True Light Novel Volume 4, High School DxD Wiki

Rias Gremory's Peerage, High School DxD Wiki

Episode 0 (Season 4, HERO), High School DxD Wiki

Short Stories, High School DxD Wiki