I read Alabaster on a whim recently and..........it was ok, for an old school manga it had its charm but the plot's pacing was terrible, chapter 1 was super fast with almost everything, chapter 2 was much slower and felt much better to read overall but then later chapters went back to the pacing of the first one and the story suffered for it, major plot details were left out and the character of ami flip flopped so much that I found it really hard to care for her or her friends and her lover at all.
Alabaster himself was by far the best character in this and he would have been an AMAZING villain had he better material to work off, I seriously really loved his screentime.
Also the ending, boy that ending. If there was ever an ending to make me feel like NOTHING HAPPENED it would be that one.