"High School DxD" is a Japanese anime and light novel series created by Ichiei Ishibumi. The story follows Issei Hyoudou, a high school student who is killed by a fallen angel but is later revived by Rias Gremory, a powerful demon. Issei becomes a member of Rias's devil family and navigates the challenges of his new life, including battles with other supernatural beings. The series combines elements of action, fantasy, and harem romance, featuring a diverse cast of characters, including other devils, angels, and mythical creatures. It explores themes of friendship, loyalty, and the struggle for power in a world filled with supernatural conflicts.