To say this manga dropped the ball would be an understatement. The entire first half of the manga is pure gold. The characters, the timing, the way they all develop and change are honestly quite amazing.

Then the second half happens and the entire thing goes downhill. The plot becomes filled with annoying cliche.

Evil twins, Amnesia, so-and-so didn't die, etc. It all comes together at the end when major players who you thought were dead all gather in the last 5 chapters for one showdown and most of them barely get a line out before they killed for no reason other than the plot demanded it. It reeks that a publisher saw the first half and then told the author not to end it. As a result, we had an anime that would have been a solid 9 go all the way down to a 5.

So much potential, opportunity, and writing were dropped for what feels like a poorly thought out extension.