Masamune-kun suffers from an interesting phenomenon, something I like to call the "Guilty Crown Effect". At the beginning, we start with a very unique plot with tons of potential, and several different characters with what looks like room for development. However, after a short feeling of general oddness it takes an absolute dive into the abyss.

In the beginning, there are several very interesting characters. Our hero is very handsome, but also extremely narcissistic. Our heroine is beautiful, but a terrible tsundere. As they draw closer together, we see that there is some depth to these characters that is making their interactions more interesting. The side characters are slowly introduced, most of them contributing an interesting and unique something to the plot.

The first few chapters are quite good, and set it up for an excellent story. As the manga continues, there begins to be a slight air of indecision, as if the author doesn't know where to go from the beginning. Characters will have important dialogue or realizations, that will then be completely forgotten by the next chapter. In spite of this I foolishly kept reading.

There was an important reveal about one of the characters, and the manga looked like within a few chapters it would reach a very satisfactory ending. And that is where everything went to absolute hell. For absolutely NO reason, new characters and a terrible plot began to be introduced. The only possible reason for this that I can think of is that the author realized he wasn't quite ready to butcher this cash milking machine.

I, being young and naive, continued to read, still holding on to that desperate hope that somehow this would all fix itself. Alas, I just got to watch my heart be broken further as the story continued to sink into the dregs of manga that exists as some sort of capitalistic, never-ending hell. Like someone in an abusive relationship, I just kept thinking that maybe next time it will be different. Spoilers: it wasn't. I eventually dropped it.

I rated this a 2. Some people may think that this is harsh, but stories like this are far worse to me than any "Mars of Destruction" catastrophe. I can easily detect poor writing, but I can't detect good writing that becomes terrible. Maybe some lucky souls are capable of sensing this sort of thing before it comes to pass, but this review is for everyone else. I implore you, in the name of good stories everywhere, do not read this manga. If you're so desperate to read something, read the first five chapters or so and then make up your own ending. Literally anything would be better.

TL;DR Starts promising, goes to shite.