User blog comment:B214/Volume 23 discussion blog/@comment-77.188.252.232-20170421223600/@comment-31137559-20170422022918

And Barakiel was a couple thousand years old. Did that stop him from getting with Akeno's mother who was in her 20s at the time? And Issei doesn't have to be some sort of genius to get a Dragon King to fall in love with him. Dragons do as they like. Issei shouldn't have gotten a pureblood vampire to fall for him, but he did.