Core setting: The protagonist's mobile takeout APP mutates one day and can receive orders from "past" and "future". For example, when he received an order: "March 12, 2015, at the back door of No. 3 Middle School, a spicy fried rice, note: Don't let me die." After he sent it over, he found that time and space had really changed. But every time it is changed, a "time debt" will now appear.
