Switching Classes in Overlord (R-18)

Watch as our lovely bony Overlord is getting a System, which leads to him getting a fleshly Body. So lean back and see as he gets a new System in every World and Maxes out 1 or a few more Classes in every World, while sleeping with almost every female he comes across in the whole Omniverse. Dreams and Reality becoming one while he starts to develop to be the strongest in the whole Omniverse with the biggest Harem.