User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-82.178.115.57-20140207040435/@comment-71.190.146.213-20140207201401

Plus Saji already told issei that he is in love with his master Sona if she fell for him it would be like backstabbing your friend even if she made the move not to mention that issei would prob be cursed by vritras flames for eternity.