User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-30924344-20171022191120/@comment-190.160.185.214-20171022221626

That would be amazing if it happened.

I can picture him and Issei fighting, and saying "if Hades-sama finds about their existence, it'll mean death for both of them" and Issei retorting something like "then give them to me, i'll make sure that no one, not even Hades, can hurt them"

It would be fitting cause so far everytime time Issei has proposed/confessed to a girl it's been in a fight against someone related to the girl(s).