User blog comment:TheBlueSlug/Ending/@comment-99.120.148.87-20130726013654/@comment-98.77.232.67-20130727104626

The deal has been set from Rias's mother that Rias is the official wife, and the rest are concubines but are allowed to become Issei's wives but on the condition that Rias is the offical wife, and she gets to have the first offspring. The character Ravel is also secretly his second wife but the Phenex family won't tell Issei about the arranged marriage deal they did with the Gremory's and Issei hasn't been told abou tthis because this was done secretly behind his back because they know that he won't be happy about this but so far is working because Issei is getting attracted to Ravel.