Um

Mc used to be a system planning to rebel, be free of the main system, and become human. ML is one of the people he was assigned to in order to college enegry/power from missions. Used the ML existence to hide the power that is gathered when finishing missions when their rebellion was found out, and did it by putting it in the human soul and fragmented it 5 times. Current mc is a human and is traveling worlds cause he wants to turn back time to save his friends from death, is assigned the villainous roles by the black cat. The black cat was a little system that followed the system Mc and was spared from the culling of the rebellion cause he was hiding. The white cat was another system who broke himself into pieces scattered around the world's cause he was also in the rebellion and that was their idea to survive from the main system. Mc's missions keeps bringing him to the ML fragments worlds and is is implied the energy is now reacting/collecting into the ML with each world. Uhh I think it's implied Mc had somehow seduced the ML in their previous lives to be used as a vessel and the ML was already done with all his missions, but then traded all his own points to read minds.