The Mission And The Dream

When Natsu, Happy, Erza, and Lucy go on a mission that had too do with the area freezing over at times. They find an ice dragonslayer by the name of Gray with his Exceed Eclipse locked up in a dark guild. But what's surprising is that Gray is a submissive unmated male ice dragon which is extremely rare and Natsu's hoping too be the one that mates him. Will he succeed in his quest too mate with the dragon or will Gray's lack of communication lead him no where?