I Recruited Every System on the Block

On a stormy night, delivery rider Chen Mo accepts an order no one else dares take: deliver an umbrella to an abandoned psychiatric hospital in the east of the city. There is only one line in the instructions: Bring him the umbrella. It's raining outside. As soon as the delivery is made, golden pillars shoot up across the city, and System tags appear above everyone's heads: Tycoon, sign-in, Immortal... Everyone's, that is, except his. His phone receives a message from an unknown sender: Too many Hosts. We can't keep track of them all. Do what you want. While everyone else grows stronger by binding with a System, he makes a living collecting them. The price is that he forgets a memory each time he takes one in. But why doesn't he have a tag?