User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-32252462-20180508103013/@comment-79.244.16.193-20180508183905

DxD is not a shonen story. It's an Ecchi/Romance/Fantasy story. Just because the protag is a boy and it revolves around fighting, doesn't mean it's automatically a shonen, as it lacks the typical traits of a shonen, for example a child(ish) MC etc. And on top of that it's waaaay to pervy to be considered shonen, since shonen animes are primarily aimed at young boys/teenage boys (shonen literally means young boy). If anything, DxD would be a seinen story (young adult).

But anyway, my point is, that a lot of people in the comment section just compare DxD to animes like DBZ. There was even someone who said that Issei will achieve a power similar to Ultra Instinct, wich is just really dumb and farfetched imo.