User blog comment:CNBA3/Future Filler Arcs (WARNING: ANIME WATCHERS, MANGA SPOILERS!!!)/@comment-24536822-20140628015354/@comment-7418318-20140628075236

I think they need something more tempting to get Romeo to leave Fairy Tail. Maybe mind manipulation magic of some kind or he could fall in love with one of the members (no matter if it's naturally or magically induced), but otherwise a good baseline for a story.