Fist of the North Star manga volume 7 features story by Buronson and art by Tetsuo Hara.

The masters of the Nanto Seiken school are known as the Nanto Rokuseiken - the Six Holy Fists of the South Star. Of the six, the most powerful is Holy Emperor Souther. But Shu, another warrior of Nanto Seiken, dares to resist Souther’s tyranny. Shu once saved Kenshiro’s life. Now the two will team up again. But Kenshiro is unaware of Souther’s secret - a secret so powerful even Raoh won’t dare challenge his reign...