Does Fairy Tail have one major plot line that is developed along the hundreds of episodes it has, or does it simply have many "chunks" of unrelated adventures (in blocks of a few episodes)?
For example, in One Piece there is one main "goal", and even though there are several different arcs, there is a clear notion of "progress towards the goal" happening with every arc. Naruto, Boku no Hero Academia and Black Clover also have clear "goals", i.e. there is also a main plot, and the "progress in the plot" is clear after every canon arc, etc.
I started watching Fairy Tail (only watched 15 episodes so far) and so far I couldn't see any "main plot" or "main goal". It seems that they will simply have different adventures, by picking certain quests/missions in the guild, fulfilling the mission, coming back and repeating this loop. Surely they will probably get stronger with time, but this is not the "progress" I'm looking for. Is there a "main goal", "main plot" that gets slowly developed along the hundreds of episodes? Or is it just a collection of loosely-tied adventures (each taking a few episodes each)?
NOTE: Don't say what the main plot is (if it exists) - hide it in a spoiler tag. I just want to know if it exists - and if possible, what is the number of the episode in which this plot becomes clear.