On earth, in addition to the laws of nature, there are laws of practical life. “One of them - the so-called law of “paired cases” - states that in some situations, troubles, accidents, as well as oddities and incidents double or occur in pairs.” This law has been tried to be explained with the help of various theories since ancient times, but to no avail. One thing is clear - it exists. Some have encountered it more than once, while others have not thought about its existence. I named my collection of short stories that way, because everything that happens to us can be that same paired case, but why this happens, each person has his own explanation, you just need to think about it. It turns out that this theorem has its own proof for each case. And everything that happened to the heroine of this collection, maybe for someone it will be that same pair of cases and an opportunity to stop, think and make the right decision for themselves.