The stage adaptation of Yukito Ayatsuji's novel, The Decagon House Murders.
| Actor | Role |
|---|---|
 Mizuki UmetsuKiyoshi Shimada | Kiyoshi Shimada |
 Seiya KonishiTakaaki Kawaminami | Takaaki Kawaminami |
 Shin TamuraEllery | Ellery |
 KokiPoe | Poe |
 Takumi MasunagaCarr | Carr |
 Rin OkabeAgatha | Agatha |
| SSachi NagataOrczy | Orczy |
| YYukia TakanoLeroux | Leroux |
 Shuya SunagawaVan | Van |
 Seijiro NakamuraSeiji Nakamura | Seiji Nakamura |