Valkyri

I can't log into my Nin Online account known as Sylvia and Anna because i forgot which email i used (since i have so many for some reason). As a result, i'm left unable to log into the game. I still remember my password it's just the email address that's unknown. After grinding so hard and spending money on cash shop items it would hurt to start all over again. I'm hoping that i could get some assistance with this matter.