After the Nationals, Seigaku goes on a trip to Osaka for the purpose of training with Shitenhouji. Meanwhile, back in America, Ryoma re-encounters with Ryoga, whom he sees training in a slum.

The story of Hyōtei's Third year regulars when they first entered middle school.

A flashback to when Kirihara first joins Rikkadai and challenges the last years winning regulars of the national tournament so that he can become number one. He loses to Rikkai's Big Three, but he vows to beat them.