The Hidden Leaf Village is holding a sports meet!  Lee is called upon to read the Athlete's Pledge of Fair Play, but screws up in front of the entire stadium.  Hoping to save face, he swears to outperform everyone at every event.  Will Guy-sensei's advice of "be confident and you'll win every time" awaken a well-intentioned demon within Lee?
Why didn't you just use
that to begin with?!
¡Si lo ibas a usar, utilízalo 
desde un principio!
¡¿Por qué no lo has usado desde un principio?!
Por que você não usou isso desde o começo?!