Soon after Ken'ichi's defeat of Ragnarok, the Ryozanpaku masters find out about an alliance between some of their enemies. Now the entire Ryuzanpaku dojo, both its masters and students, find themselves targets of powerful martial artists. Source: ANN Note: Bundled with the 46th, 47th, 49th, 53rd (two episodes), 54th (two episodes), 55th (two episodes) and 56th (two episodes) volumes of manga. The OVA aired on television in Japan as an 11-episode series from April 9 till June 18, 2014 with the subtitle 闇の襲撃 (Yami no Shuugeki).
NOGRP and KEKKU are USA BD Remux+PGS The BD uses the TV master, from blu-ray.com forums: "The DVD version was made first, and the TV version is the "edited for television" version done later. It has a new opening, but the episodes are cut for broadcast length, since the DVD episodes ran a few minutes longer than a typical broadcast episode. It's also censored, with nudity (and possibly violence?) removed."
Comparisons: slow.pics