User blog comment:Omega natsu2/Chapter 385: Spirit King vs. Demon King, Predictions./@comment-5233713-20140523050814/@comment-7418318-20140523091004

There is one contradiction in an omgake that I know from memory, without having to check in "Beware of the guy who shows keen interest". There Lucy and Natsu go on a mission on the first anniversary of their meeting at Hargeon, but in the actual story they are frozen in Fairy Sphere at that point of time.