Les Cousins

The film Les Cousins was a film about a naive, high-strung country boy (Charles) living in the city with his cousin (Paul) while studying for a very important exam. Paul is the sort of guy that would party on a tuesday night with a full set of classes the next day, but Charles is the kid that would stay in and try to shush everyone up while he was studying. The two personalities are a stark contrast in many aspects, including the way they treat Florence, Charles's love interest, and the way the approach the exam. 

Charles is a "mama's boy." He writes her everyday, and is set on making her proud. The way he interacts with Florence is apprehensive because his mom told him that "girls are evil." Paul on the other hand loves his women, booze and parties. He has guns hanging on the wall and a mischievous goatee - as opposed to Charles's clean-shaven boyish face. the way they approach the exam is also ironic in the sense that Paul passes with flying colors (when he doesn't study at all) but Charles, who stresses out about the exam to the point of a melt-down, fails the exam.

It is  this inability to relax that leads to Charles's downfall. He becomes so hung-up on the exam that he almost kills his cousin, but paul accidentally kills Charles out of good fun - not out of jealousy and rage.