The thirteenth volume of the popular ecchi light novel High School DxD by Ichiei Ishibumi will come out September 20, 2012 and inside the package everyone will receive a special unaired episode of the television anime series on a Blu-ray Disk.
The episode itself will be written and overseen by the original creator of the story Ichiei Ishibumi. The limited edition of the 13th volume will also come with an especially designed illustration on the cover.
As you probably already know everything about this new very popular show that aired this January 9th, I will not bug you with anymore additional plot information. All I will do is link you to the High School DxD Preview on the ShinigamiList.
Source: Anime News Network
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