After studying in sims 3 University for a semester, the villain went home by himself. A semester is actually a week in the game. When you sign up, you will be given a choice of one semester or two, mainly depending on the credits. Sometimes one week in a semester is not enough to read all the credits, but it takes two weeks. Since a semester is a week, the end of the semester is the weekend, and on Saturday or Sunday, the villain will go home by himself. You don't have to control how he gets home. He will take a taxi back to the town where you were born with the box. You can't stay if you want to. No matter what you were doing before, you will interrupt the interaction and force you to go home.