User blog comment:B214/Volume 23 discussion blog/@comment-3965848-20170320094444/@comment-30924344-20170320100512

Sorry that was in V5, but they are still not engaged. "Koneko asks him to make her his bride after confessing that she loves him. He agrees to her proposal, on the condition that she grow in height and bust." Back then Issei said he would marry WHEN she gets an adult body. Issei's changed now so he himself is gonna propose to her regardless of the fact she doesn't have an adult body.