Unlimited Spending, Ultimate Winner

Zhou Chen is a college student with nothing left when a system attaches itself to him and offers an upgrade. It hands him ten trillion in funds with one condition attached: the money can only be spent on one girl, the one the system has bound him to. He is obliged to spend, and to spend on luxury, so he starts buying at a scale that gets noticed. The spending changes how he is seen. He is rebuilt into the sort of man wealthy families and their daughters chase, and the attention comes from people well above his old station. All the while the system has been holding back one last task, which it has not told him about.