Light curve of KMT-2018-BLG-0321. The lower panel shows the whole view of the light curve and the two upper panels show the enlarged views of the two anomaly regions. The curve drawn over data points is the best-fit 2L1S model. The inset in the lower panel is the lens system configuration, which shows the source trajectory (line with an arrow) with respect to the lens caustic (red figure). Lengths are normalized to the angular Einstein radius corresponding to the total mass of the lens system.