User blog comment:B214/Volume 23 discussion blog/@comment-183.87.180.246-20170602072629/@comment-31137559-20170602113847

Again that's saying he has known he has had romantic feelings for the rest of them for a while. Was Issei in a romantic relationship with the other girls since Volume 10? If not, you have no comparison. Being first doesn't mean he loves her more than the others. That's an impossible comparison since he wasn't in a romantic relationship or even aware of romantic feelings for the others. Of course he spends alone time with Rias since she was his girlfriend and the others weren't. Unless the other girls were his girlfriends or he was aware of his romantic feelings for them along with Rias, you can't make a comparison. And the only development I've seen is Issei deciding how to talk to Rias. And they barely got any alone time not to mention that they shared a bed with Asia and not to mention the other girls sneaking into his bed occasionally.