Nisemonogatari is an anime adaptation of the fourth book in the series; it, like Bakemonogatari, is a two-volume set. As indicated by the subtitles of the books—"Karen Bee" and "Tsuchihashi Phoenix"—this time Araragi"s younger sisters will get into trouble with monsters. We have already seen them (sporadically) in the first season, and it"s time to get to know them better.
SHAFT Japan