Natural 2 - Duo (Japan) - Gameboy Advance - Visual Novel

A roleplaying / adventure game based off a pornographic OAV, with all sex scenes removed from the Game Boy Advance game. Chisato and Kuu lost their parents years ago and were taken in by an old man and his grandson, Chisato and Kuu became good friends with his grandson however he left and never came back. Now years later Chisato met up with her "Onii-chan" her lost love.