Kageyama (Sho Sakurai) works as the butler for rich heiress Reiko Hosho (Keiko Kitagawa). Reiko happens to be a novice detective but lacks certain deductive skills needed by detectives. Because of this Reiko relies on Kageyamaa to help her solve cases. Meanwhile, Kageyama isn't afraid to mince words and often calls out Reiko with his sharp tongue!
| Actor | Role |
|---|---|
 Keiko KitagawaReiko Hosho | Reiko Hosho |
 Sho SakuraiKageyama | Kageyama |
 Kippei ShiinaKyoichiro Kazamatsuri | Kyoichiro Kazamatsuri |
 Masatoshi NakamuraTakuya Todo (cabin manager) | Takuya Todo (cabin manager) |
 Hitomi MiyauchiRinko Todo | Rinko Todo |
 Jun KanameTenmei Ishikawa | Tenmei Ishikawa |
 Takeshi KagaShinnosuke Unabara (ship captain) | Shinnosuke Unabara (ship captain) |
 Tomoka KurotaniChika Yuki | Chika Yuki |
 Masahiro KomotoJunichi Matsushige | Junichi Matsushige |
 Koji OhkuraYuta Koenji | Yuta Koenji |
 Kazuya KojimaParaji・Isuwaran | Paraji・Isuwaran |
 Eri MurakawaMizuki Makurazaki | Mizuki Makurazaki |
 Jiro DanRaymond Yo | Raymond Yo |
 Shirō ItōKarasawa | Karasawa |
 Katsuhisa NamaseTen Kyogoku | Ten Kyogoku |
 Naoto TakenakaKenta Koenji | Kenta Koenji |
 Rie MiyazawaMiho Kumazawa | Miho Kumazawa |
 Rokkaku SeijiNot listed | Not listed |
 Yoji TanakaNot listed | Not listed |