1. A slice image creation device usable for a three-dimensional printing device that prints a target object as a printing target, the slice image creation device slicing a target object model, which is a three-dimensional model corresponding to the target object, at a predetermined interval to create a target slice model and creating a target slice image of the target slice model, the target slice model being defined by a plurality of contours including a plurality of line segments, the target slice model including an intersection at which at least two of the plurality of contours cross each other, the plurality of contours including an island contour representing a shape of an outer profile of the target object and a hole contour representing a shape of a hole in the target object, the slice image creation device comprising: a circulation direction setting processor configured or programmed to set different circulation directions for the island contour and the hole contour; a peeling line segment setting processor configured or programmed to set a peeling line segment that is one of the plurality of line segments of the plurality of contours of the target slice model on which peeling is to be performed, the peeling being performed to acquire a contour distinguishing a printing region corresponding to the target slice model to be printed by the three-dimensional printing device and a non-printing region not to be printed by the three-dimensional printing device; a peeling processor configured or programmed to perform the peeling on the peeling line segment in the circulation direction of the peeling line segment; an intersection information acquisition processor configured or programmed to, when the peeling reaches the intersection while being performed on the peeling line segment by the peeling processor, acquire intersection information including an intersection angle that is defined at the intersection by the peeling line segment and each of a plurality of candidate line segments, the intersection angle being defined by the peeling line segment in a direction that is the same as the circulation direction of the peeling line segment, the plurality of candidate line segments being included in the at least two of the plurality of contours crossing each other at the intersection; a transfer processor configured or programmed to set one of the plurality of candidate line segments that has a smallest intersection angle, that distinguishes the printing region and the non-printing region from each other, and that is located at an outermost profile, as the line segment to which the peeling is going to be transferred next from the peeling line segment at the intersection, and to set the one of the plurality of candidate line segments as a new peeling line segment; and a creation processor configured or programmed to set the line segments on which the peeling has been performed continuously by the peeling processor as a generated contour, and to divide the target slice model into the printing region and the non-printing region based on the generated contour to create the target slice image.