Story about a singer/dancer. There is music and singing throughout almost the entire OVA.

Zundamaru is back... For now! Even without missions, we elite ninjas face grave dangers every day!

In a post-apocalyptic world, the treasure hunter Riot and his pretty sidekicks are searching for Eyes of Zalem, which they hope will guide them to Rido, the treasure of a long-lost Quall civilization. A limitless energy source, the Rido has the power to even restore life; but unfortunately for Riot, the evil Demsters are after it too.