I was definitely not expecting to be able to complete a set (so far, as volume 11 is slated to release in September) of this series in a decently moderate amount of time. Off the top of my head I believe the earlier volumes were way harder to obtain — especially volume 4. In my haste and perhaps desperation to obtain them in a timely manner, I ordered from quite a variety of different stores, and that is how I ended up with four copies of volume 4. Perhaps I can use this as a way to collect multiple sets, treating it as a new game plus of sorts. The minimum right now though is to just complete a 2nd set because that will be meant for myself. The first set that is complete (as of this posting) is meant for a friend of mine and I will be bringing that with me on the trip I am taking a few hours also from this post. It’s still insane to think how popular the manga became after the airing of the anime, considering that the manga was already printed for about two years before the airing of the show.