Neko Tsukahara decides to work at the "Tasogare Hotel", a place that exists between the worlds of the living and the dead. Under the guidance of Atori-senpai, she begins her strange life there. One day, a guest with a love for gambling and a pachinko ball for a head requests a game of mahjong. Later, as she tries to tidy up his cluttered room, an old black telephone suddenly starts ringing...