User blog comment:B214/Volume 21 info & spoilers/@comment-64.237.225.232-20160329204304/@comment-4547267-20160401161902

Exactly, they are teenagers, and as far as we know, his friends and lovers still see him as a good man and a good father, just very busy. Gasper knows what's going through Issei head and knows that he would love to not only spend time with his lovers, but his kids too. Beside, Boruto does love his father, but took time to realize why the thing he do because he is a teenage who didn't live the same life as Naruto. Issei kids may have lived during war time, but what it seem to me that they are born and trained to be very skilled at a young age while Issei had to work his way up when he was a teen.