A trailer for the first episode of Black Lagoon: Roberta's Blood Trail - titled "Collateral Massacre" - which was released in Japan on Blu-ray and DVD on July 17. The Black Lagoon OVA is the third anime adaptation based on Rei Hiroe's action manga. Studio Madhouse is once again producing it, only this time as a 5-episode OVA series, planned for release throughout March 2011 (the second episode - titled "An Office Man's Tactics" - should follow this September 30). The new story marks the return of former guerrilla assassin Roberta to the fictional criminal's city of Roanapur, Thailand.