From the back cover:
Take control of d20 System character creation!
BESM d20 provides you with a point-based character creation mechanic that gives players and GMs a method to create exciting, dynamic, and balanced d20 System characters for all styles and genres of play.
You can use BESM d20 by itself, or plug it into your favourite d20 System game. It's built for anime--but powerful enough to handle anything.
d20 Redefined. Taking characters to the next level.