The manga got axed because it sold poorly.
However, it was an amazing effort from the author to wrap the story up quickly and effectively. So don't hesitate to pick it up. It's only 3 volumes: short, succinct, full of interesting psychological ideas, aspects, character developments, and story-telling that are not bottled up like other very melodramatic mangas. (Seriously, think about bullying, harassments, sexual abuses, and the worst the never-ending tragedies you have read.)
At the end, it is forthright, positive and promising. The messages of self love, the love and care from those around who truly love and care for you, and communication are focused.
It's truly a shame that this got cancelled because of sale performance. And it (and the capable Be Blues Project) speak(s) volume about what readers can do, or the potential difficulties the author and the publisher faced. (Great ending notes from Be Blues Project. Thank you guys for having finished this quality project qualitatively!)
Still, I am very, very hopeful for the author ('s future) and really recommend this series.