User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-38412599-20190204191903/@comment-38340421-20190224020839

Yeah i don't think it was a dream at all. Just a vision that was given to Issei. Plus i've seen a tweet from the author listing something abouv valetines day and who should Issei give chocolate to. All of the future waifus on that list, were the ones in the that vision. Which included Yasaka and her daughter Kunou. Plus on a personal note i'm happy with Yasaka was added to that list. Might get to here more of her backstory later on. Which i had a theory of that happening in the first place. I think the author wants to put the amount of waifus to a lvl that other stories won't be able to match it. So in that world and in real life, Issei would be the Harem King. Because originally i think he had in mind 12. But with alot of stories the last 5 to 8 years coming close to the number of waifus that Issei has. He wanted to put the bar even higher. So he added 3 more to the list for now and possible more down the road. But that's just what i think from the info that has been presented to us so far. :)