The battle against the 10th Generation Black Dragons and their formidable leader, Taiju Shiba. Why only 13 episodes?

There are no OVAs or extra episodes beyond this count for the second season.

The second season focuses on the "Christmas Showdown" arc, a pivotal moment in the series' timeline that alters the trajectory of the Tokyo Manji Gang. Understanding the episode count requires distinguishing between the standard television broadcast and the streaming distribution model employed during this specific production cycle.

To recap, if you are counting the episodes for the specifically, there are 13 episodes . If you include the Tenjiku Arc (often confused as part of the same production cycle), you have a total of 26 episodes to enjoy beyond the first season.