Rebirth Moon Divergence
Japanese title: リバース ムーン ディバージェンス
Type: OVA
Source: Game
Episodes: 1
Status: Finished Airing
Aired: Nov 23, 2005
Duration: 17 min
Producers: Idea Factory
Genres: Action, Fantasy

Ires and his father, Leglight are peddlers. Near Gramnoa,they met a genius "tempest", Yuan. Yuan thinks they are bandits, and began to fight. Leglight wields his mystic weapon, and beats him back. However, right after that, he is swallowed into black light leaving the weapon, a "device", and a message, “Visit Oldman in Gramnoa”. To look for his father, he leaves for Gramnoa. 

(Source: Animenfo)