User blog comment:B214/General Discussion/@comment-1359322-20161106045332/@comment-9595671-20161108000305

I think EX already showed us he's not exactly happy with the Chichiryuutei thing going by one response in the EX chapters, he didn't get why Issei married only girls with large breasts and all his kids once thought that's what decided you were a woman. (Sona did not like that)

The irony is that in the present, not everyone in his harem has large breasts yet. (Wonder if that confused Ex more?) So whatever changed in all those years... *shrugs* either we see it in this arc, an epilogue from the last volume, that sequel series related to Millicas that Ishibumi's got ideas for or not at all.