A kinematic system is proposed for adjusting a side flap of a cover assembly for a vehicle with an openable roof, the kinematic system being adjustable between a covered position and a stored position, and the kinematic system being designed in such a way that the side flap undergoes at least one translational motion and at least one rotational motion during the adjustment, and characterized in that the kinematic system has a four-bar linkage kinematic mechanism for the translational motion and a guide track for the rotational motion.