In traditional image composition methods for cutting out a source object from a source image and pasting it onto a target image, users have to segment a foreground object in a target image when they want to partially hide a source object behind it. While recent image editing tools greatly facilitate segmentation operations, it can be tedious to segment each object if users try to place a source object in various positions in a target image before obtaining a satisfying composition. We propose a method which allows users to drag a source object and slip it behind a target object as shown in Fig. 1, so that users can move a source object around without manually segmenting each part of a target image.