User blog comment:Xhatefate/DxD Updates~/@comment-16281343-20150518234334/@comment-1359322-20150520175151

Ise finally powers up with another breasts.

But jokes aside, the summary did give us quite a number of hints. First, the Phenex's siblings might still be alive, maybe they were used for the same experiment in Volume 14. Second, DxD might be sent to enter a pro league for the Rating Games. Third, we can expect that whatever happened between Diehauser and Tiamat most likely ended badly since the number of irregularities increasing.

And from my own thoughts, i have a feeling that the Phenex Siblings will somehow unlock a new power-up for Ise.