As a dorama series by itself, I think it's doing pretty badly right now. The story is progressing slowly and all over the place. All the minor characters are pointless (they can cut down the cast by half). The character Kouji is uninteresting and lacks focus (what the hell does he want!?). Asami is annoying with all her sobbing (just stop writing songs!).
At the beginning, Erika brought a lot of depth to her character...and it seemed like she was so good that the rest of the cast and the poor writing of the story couldn't keep up. Now, the story is going so bad that Erika/Kaoru just looks bored throughout the whole series. By this point, I honestly don't care about her dying.
If we have to compare to 1 Liter, then obviously, 1 Liter rules it by a mile.