User blog comment:THE TERRIFYING TITANIA/Is there a connection between Master Mavis and Zeref?/@comment-113.210.8.207-20140513150040

They used to be close friend or maybe boyfriend and girlfriend. Maybe Zeref was too obsessed with the dark magic or the dark side until he can't find the light in him anymore. That's when they had to depart. So Sad. The end. (just a piece of my thoughts)