What happens right after Romeo kisses Juliet at the feast?

After Romeo kisses Juliet at the Capulet feast, Tybalt, Juliet's cousin, is enraged by Romeo's presence and draws his sword to fight him. Romeo, who does not want to cause trouble, tries to avoid the fight, but Mercutio, Romeo's friend, steps in to defend him. Mercutio is killed in the fight, and Romeo, in a fit of rage, kills Tybalt. This act of violence sets in motion a chain of events that ultimately leads to the deaths of Romeo and Juliet.