Though its title and theme are "pretenders", this anime is not really about fraud.
In each case, the protagonists cheat the rich bad people and make society a better place. As the story unfolds, you will see that the main characters each has their own emotional background stories. They are just normal people who were helpless in this capitalist society that is full of fraud already, and decided to use this weapon against what once hurt them the most. This is an story about justice and love, told in the most stylish and warm way. A good combination of western culture and Japanese animes' profoundity.