"Saigo no Yakusoku" is described as a human suspense story involving the hijack of a major building. The members of Arashi play five young men who happen to be inside, and the story depicts their attempt to escape and their interactions with the other people caught up in the incident.
| Actor | Role |
|---|---|
 Satoshi OhnoSatoru | Satoru |
 Kazunari NinomiyaShuji | Shuji |
 Sho SakuraiChu | Chu |
 Jun MatsumotoNozomu | Nozomu |
 Masaki AibaAkira | Akira |
 Meisa KurokiYuriko Niimi | Yuriko Niimi |
 Yukiya KitamuraGenji Morozumi | Genji Morozumi |
 Nene OtsukaFuyuko Todoroki | Fuyuko Todoroki |
 Kazuki KosakaiHaruo Lio | Haruo Lio |
 Masahiko TsugawaTomohiko Niimi | Tomohiko Niimi |
 Naohito FujikiShinichiro Okanaka | Shinichiro Okanaka |