The game started as a joke among the residents, but that night, the manager of the condo falls to his death from the rooftop. And a paper with the word "Manager" written on it is found on the bulletin board later.
Yamagiwa, whom Fujii wished dead, is murdered, and Fujii receives a threatening letter. A special residents meeting is held to discuss who sent the threatening letters. The residents start developing suspicions about each other.
The leg of a resident is found in a golf bag and the rest of the body is missing. One of the other neighbors reveals that she wrote the victim's name. Some residents decide to contact the police about the murder game.
The person whose name is written by Tamiya is killed in front of Nana and Shota. Since Nana is the one who was supposed to kill this victim if there really is a swap murder game taking place, a lot of questions arise.