User blog comment:B214/High School DxD EX/@comment-178.237.101.5-20151130122815/@comment-26821288-20151130134048

Issei has about 20 or more children. Something about with all of his harem. Which means: Rias, Akeno, Xenovia, Asia, Rossweisse, Koneko, Kuroka, Ravel, etc. I don't know how they get all of their interesting spoilers.