|It was previously announced, that the limited edition of the 28th compiled volume will contain another OAD, yet it would seem that this was a false announcement. They now stated, that said OAD will be contained in the 27th and final volume of the manga.|
The manga will finish in the eleventh issue on February 12th and the 27th compiled volume will be released together with a 200-page spin-off centered around Nagato on March 27th, 2014 in Japan.
In 2012 the manga already received a two-part OAD-series and in 2013 a 12-episode-long anime adaption followed. The two last OAD episodes of the series will be released on January 17th and March 27th.
Kodansha has been publishing Kouji Seo's manga since 2008, after he finished his Suzuka, which was adapted as a 24-episode-long anime series in 2005 as well.