User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-1.53.124.174-20150712141105

I'm disappointed at the later vol come after vol 12 aren't as good as before, for one thing how many times Kuou Town had been infiltrated? If it was such an important place then why didn't they increase the security right after Euclid? Or even Yaegaki? How could those enemies keep appearing like that without detection? All I can see start from vol 17 is:

-Enemy appeared.

-Enemy challenged.

-Issei and co couldn't do any real damage to enemies or captured them despite everything they had been through.

-Enemies retreated.

-The main characters defeated the enemy somewhere else.

It's really becoming repetitive and the quality of the story has dropped.