User blog comment:IamJakuhoRaikoben/Chapter 503: The Last Sight Seen, Review./@comment-121.54.54.47-20160927135437/@comment-1359322-20160928103011

Yeah next chapter we'll see Gray finally confess his love towards Natsu. Then Gray decides to fight Natsu to prevent him from killing Zeref because Gray somehow knows that if Zeref dies, Natsu dies. And hence Chapter 505: Battle of the Unholy Lovers.