Nanatsu no Hikan for the Playstation was released in 1996 by Koei. It was also for the Sega Saturn and had a sequel on the Sega Dreamcast called Nanatsu no Hikan Senritsu no Bishou. This is from the PSone version. The game starts with this long cutscene to explain everything. Nanatsu-no-Hikan roughly means "The Seven Manors."