User blog comment:B214/Question and Answers 2/@comment-4547267-20140319041204/@comment-24098614-20140320223410

Issei's parents have known about Issei dating Rias for a while, and they both want grandchildren up to the max, which got both of Rias and Issei flustered, and I like Issei's dad because he wants Issei to give him a Harem not bad old man.