Immortal Rain: Shinigami of the East

From Inconnu:
Zol, a bounty hunter who goes by the name of "Grim Reaper", spends his days chasing criminals under the orders of Fuse, his master and the city's respected major.
One day, Zol takes up responsibility for burying a man who died in a hit-and-run on the streets. But much to his surprise, the supposedly dead man pops out of the coffin!! Is this the world's most wanted man, Methuselah?!
This is the adventure-packed miniseries of the fateful encounter between the Methuselah named Rain and Zol the Grim Reaper, who is the grandfather of Immortal Rain's heroine Machika!!