Seven men and women, consisting of three couples who are reluctant companions and one single man, play in the game with the secret that their relationship and friendship will collapse. Japanese remake of the Italian movie "Perfetti sconosciuti".
| Actor | Role |
|---|---|
 Noriyuki HigashiyamaSanpei Koyama | Sanpei Koyama |
 Honami SuzukiEri Rokko | Eri Rokko |
 Toru MasuokaTakashi Rokko | Takashi Rokko |
 Takako TokiwaKaoru Sonoyama | Kaoru Sonoyama |
 Hiromasa TaguchiReiji Sonoyama | Reiji Sonoyama |
 Haruka KinamiAnzu Mukai | Anzu Mukai |
 Yasushi FuchikamiKoji Mukai | Koji Mukai |