What kind of title is this?: Manga.
How many volumes are there?: 11 volumes are listed.
How many chapters are there?: 78 chapters are listed.
Where can I read it?: Reading links are listed for Yen Press, Official Site. Check availability in your region.

Synopsis

About High School DxD

When unpopular high schooler Issei Hyoudou has a less than romantic encounter with his first-ever girlfriend, the consequences are fatal! As he lies dying, who should come to his rescue but the prettiest girl in school, Rias Gremory! And the shocking truth she shares leaves Issei reeling... "You've been reborn a devil. Now you work for me!" Issei's uproarious life as a devil's minion begins here! (Source: Yen Press) Note: Includes two extra chapters.

Comedy Ecchi Fantasy Romance