The heero is an individual named Lelouch "Lulu", who has a mysterious tie to the Britannia leadership and acquires a power to manipulate the minds of others. He decides to use this power to bring about a revolution.
With Geass, you've got a war story and then the characters go back to school. Brilliant combo ... where have we seen this before. <grin>
I get a vibe of V - for Vendetta from this show and thats because Lulu has a flair for drama and over-the-top acting. Maybe it's meant to be serious but the way it's played out, it's hilarious.
Strangely after most of the episodes you feel this strange craving for Pizza.

imho don't miss it.