Yu Yu Hakusho Vol. 7 (manga)

Hiei and Kurama: A Tale of Friendship

Engulfed in the Dark Tournament's sinister spirit of victory (more like survival), Team Urameshi's Hiei and Kurama dig deep into their arsenals to battle the vicious henchmen of Jolly Devil Six. It's Kurama vs. Loto and Hiei vs. Zeru, and the rules do include playing dirty. Meanwhile, Kuwabara experiences an enigmatic reverie about the members of Dr. Ichigaki's team, a group of martial arts students who enlisted in the tournament in exchange for a cure for their ailing master.

As a final treat, enjoy a bonus episode about the chance meeting of Hiei and Kurama a year or so before they encountered Yusuke. Discover the bond that enabled Hiei and Kurama annihilate a mighty demon.