The results of two-dimensional dynamic calculations performed to simulate the domain transcription process in the readout layer of a magnetostatically coupled dual-layer magneto-optical recording medium and those of one-dimensional calculations made to clarify the nature of the domain wall in the readout layer are given. Detailed time-dependent magnetization behaviors in the readout layer are obtained in the former calculation showing the effect of various parameters such as the atmosphere temperature, stray fields from the recording layer and external fields, on domain transcription. The coercivity of the readout layer is realized by introducing dispersion into the magnitude of the anisotropy constant among computing cells, and the Landau-Lifshitz-Gilbert equation is solved numerically. The magnetization structures in a straight-line wall both in equilibrium and in motion are calculated in the latter calculation.