User blog comment:B214/Talk About What You Want! 3/@comment-72.240.208.36-20150415054601/@comment-26209278-20150415162731

In the LN the only reason Rias and Issei met is because he accidently summoned her from her peerages summoning leaflets. She had no interest in him until then (this differs from the anime). She knew fallen angels were around, but didnt know what they were up to