I think this series could have been potentially "okay" if it had been longer. I have a feeling it'd be full of dramatic cliches, but at least that'd be better than a rushed ending. Chapter 3, I believe, is the concluding chapter, and it pretty much mashes up a bunch of events together in a short period of time--climax and falling action (if I remember my theatrical terms correctly).
The art itself isn't the best, either. I'd give it a 5 or 6 out of 10.
I like the smutty scenes, but "smut" isn't a reason for lack of character development. Seike is the only interesting character here. The female lead and the violin teacher are shallow characters, whose drive is influenced by one event.
Even if you are in for a quick read, I wouldn't suggest this.
Edit:
Okay, so chapter 4 came out and it's the last chapter. It doesn't do a good job summing up everything, as I'd hoped for (because you can't fill in what happens after the conclusion), but it certainly did have a more "chillax" pace as compared to chapter 3. This is the steady pace I wanted for the entire volume, not just in chapter 4, so I'm still disappointed and sticking with my earlier rating.