Gajeel has always been in love with Levy and figured she only saw him as a friend, but what he doesn't know is that Levy loves him too and everyone can see it except them, but when Levy almost gets hurt, Gajeel comes to the rescue.
Levy has a date the next day and Gajeel doesn't take it well. He wants to attack her date. When her date tries to kiss her, Gajeel goes ballistic. No one is allowed to kiss his Levy and get away with it.
Gajeel doesn't know why he feels the way he feels so he looks it up. It turns out, Levy is his mate. Dragon slayers are known to be protective and possessive over their mates. Now he understands why he feels that way. Will they ever proclaim their love for each other before it's to late, or will they be left wondering 'what if...'