High School DxD, Vol. 15 (light novel) Paperback – December 10, 2024by Ichiei Ishibumi (Author), Miyama-Zero (Artist)
Finally, the spotlight shines on Yuuto Kiba. Just how did ne and Rias meet? How did he become a demon? The ban finally lifts on this forbidden episode, and Yuuto and Rias’s past is revealed!