In the present work, we propose a protocol in which the on-the-fly SQC/MM dynamics is combined with the DW methodology, and apply it for the simulation of TA PP spectra. In our protocol, the windowing scheme employed for the assignment of quantum states in the SQC/MM framework is used to define the currently occupied electronic state and to specify the transition dipole moment (TDM) between this state and the target state. This simplified treatment permits a convenient and efficient evaluation of the DW functions and provides an efficient and effective way to simulate TA PP signals on-the-fly.