I Have 900 Billion

The protagonist binds himself to a System and receives 900 billion, but he can only spend it on women the System recognizes as "goddesses," and he cannot give them money directly.

Rather than becoming a lovesick doormat, the protagonist exploits information gaps and business tactics to "milk the System." For example, he spends 1 billion to invite stock god Warren Buffett to lunch on behalf of a goddess worth only tens of millions. Once the news breaks, her company's stock price soars, and the call options the protagonist bought in advance earn him 5 billion in an instant. It looks like he's spending money on the goddess, but in reality, he's paving his own way.