User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-71.22.48.102-20150719075007/@comment-25852719-20150719185019

he's already kissed rias quite a few times, he's also kissed some of the other girls as well so it doesn't really matter, as for who he marries he is aiming for a harem so it doesn't matter who he marries.