Rei Gaiden: Kareinaru Fukushuusha
北斗の拳 レイ外伝 華麗なる復讐者
A one-shot manga that serves as a prelude to the ongoing Rei Gaiden series, it depicts Rei traveling through a desert in a post-nuclear future, searching for his missing sister Airi, set in the same universe as Hokuto No Ken.
