Lin Xiaobei encountered a supernatural event while working the night shift at a convenience store, and was accidentally bound to a strange AI that claimed to be "the most powerful sign-in system in the universe." The sign-in tasks issued by the system are all kinds of weird, from "sign in the women's restroom" to "keep smiling when being possessed by a ghost", and the rewards for completing them are even more incredible - a toilet that breathes fire, chewing gum that can translate animal languages, a cursed mask with its own beauty effect...
As the number of sign-ins increased, Lin Xiaobei gradually discovered that there was a shocking secret hidden behind this system: the world he was in was actually an "outlier containment station" for countless parallel universes, and his sign-in behavior was inadvertently repairing the cracks in the multiverse.
