Board Thread:Questions and Answers/@comment-180.234.43.18-20140315144956/@comment-4651437-20140611001120

The series has ended, yes. There are 17 volumes (18 if you count the "Children" volume of character backstories that I believe was only released in Japan) containing a total of 99 chapters. As far as I can tell the atuhors haven't written any other manga.