Buffy and Willow enrolling at UC Sunnydale, while Xander begins his working life. While the first three seasons dealt metaphorically with adolescent struggles, their post-high school life now deals with issues of leaving home, redefining relationships, and adapting to more responsibilities and social pressures. UC Sunnydale sits not on a Hellmouth, but a top-secret military installation called The Initiative. Special-ops soldiers pose as teachers, students, and fraternity brothers. The Initiative is headed by Maggie Walsh, Buffy and Willow’s Psychology professor. Riley Finn, with whom Buffy eventually finds a loving relationship, is Walsh’s teaching assistant by day and her protégé in the Initiative at night. Buffy and Riley strive to protect their secret identities from each other.