Natural 2: Duo is a four-episode OVA series produced by Arms Corporation, with Episode 4 serving as the series finale.
The series follows Chisato and Kuu, who, after losing their parents, were taken in by an elderly man and his grandson. They developed a close bond with the grandson, who eventually left and did not return. Years later, Chisato reunites with her "Onii-chan," rekindling past emotions and connections.
Episode 4, titled "HI-NA-MI," was released on July 24, 2003, bringing closure to the characters' intertwined stories
