A seat belt for a vehicle comprises a first tongue coupled to a first webbing, the first webbing configured to cover portions of a shoulder, a chest, and an abdomen of a passenger; a first buckle coupled to the first tongue; a second tongue coupled to a second webbing, the second webbing configured to cover portions of the abdomen of the passenger; a second buckle coupled to the second tongue; and an actuator configured to upwardly pull the first tongue and the first buckle, wherein the first buckle is coupled to the second buckle; and upon a collision of the vehicle, the actuator operates to separate the first buckle from the second buckle, and the first webbing moves upward, restricting a movement of an upper body of the passenger.