From the publisher:

The confrontation between the Juken Club and the Executive Council enters a brand-new phase. With only a month to go until the Imperial Martial Arts Tournament, Soichiro continues his intense training. But what good is all that sweat and pain if Soichiro can't figure out what he's truly fighting for? The appearance of the mysterious group known as "F" might help him get a clue--if they don't kill him first! Then a rescue mission to Kyushu to save Mouki, the last survivor of the Enmi family, puts everything on the line in an epic battle that will decide things for Soichiro one way or the other!