Kamen Rider Agito was basically a long complex story where the real enemy is fate itself (think Timeranger). The Lords as antagonists were killing people with the Agito seed because it was going to be a threat to humanity itself. But B.S. Man is a different story. Unlike Shouichi/Tetsuya in Agito he is not after the good of humanity or trying to solve the conflict of the Lords and humans. Instead, he gets gifted with the power similar to Agito which he misuses hoping to destroy Universal Karma from punishing his friends and allies. B.S. Man's mythology takes back to the long, long ago when the three Overlords created humanity. These three Overlords once worked in perfect harmony as the Overlord of Creation, Overlord of Preservation and the Overlord of Destruction - all acted by Rei Haneo who played as the two Overlords in Agito. Once upon a time, the world was chaos and there were three Overlords all acted by Rei Haneo. One was the Overlord of Creation, the Overlord of Preser...
Some of my random thoughts from a hyperactive mind!