User blog comment:Gary299/High School DxD BorN episode 4 review/@comment-117.195.96.108-20150427165203/@comment-26209278-20150427180226

None of the plot has been unneccesary so far in the anime, and only unimportant stuff has been cut. It's just re-ordering the first half of vol.7, and mixing it with 5/6.

As for when we see JD, i'd say around episode 8-10, somewhere around there....