Thread:Monterossa/@comment-24098614-20170118230905/@comment-3285616-20170120204225

I would not necessarily say that they left it out, as so far the anime has only gotten up to around volume 8, with order of events scrambled around a bit. While there are many indications of sex, such as the mentioned room to have sex in without Irina becoming fallen, I believe Issei doesn't actually have sex with any of them in the present within the novel. However, in DxD EX, Issei meets his children from the future, which includes Irina's child, and children of other girls (most are the girls from the ORC). So yes, Irina is defintely in the harem, and he will have sex with the girls, whether this will be something like a "ten years later" in the epilogue of the novel or anything like that is anyone's guess. I don't think it will actually state in the novels explicitly that he's having sex with the girls in the present, though xD