You shouldn't do drugs when you're underage.
James feels stressed by the pressures of maintaining his grades and participation in four different extracurricular activities.
James wants to feel less stressed.
James tells his parents that he wants to drop two extracurriculars, so he can have a more reasonable schedule.
James starts smoking pot, so he'll feel less anxious about all his obligations.
James is able to sleep more and occasionally spend time with his friends.
James' grades begin to suffer, causing his parents to confront him at least once a week.