Series synopsis
Sai is a Japanese mystery television series that premiered on WOWOW Prime on April 6, 2025. It ended on May 11, 2025. It stars Teruyuki Kagawa, Anne Nakamura, Pistol Takehara and Ryuhei Matsuda.
Sai, the resilient daughter of a troubled past, grows into a strong and independent woman while cherishing memories of her childhood protector Bee as her “first love,” navigating life and love alongside the charming and handsome Chan.
Premise
Sai, the resilient daughter of a troubled past, grows into a strong and independent woman while cherishing memories of her childhood protector Bee as her “first love,” navigating life and love alongside the charming and handsome Chan.
Cast and characters
Leading cast
- Teruyuki Kagawa as Mysterious Man
- Anne Nakamura as Midori Domoto
- Pistol Takehara as Tsuyoshi Iida
- Ryuhei Matsuda as Shinichiro Kuramoto
- Sena Nakajima as Yuri Kitagawa
- Chika Uchida as Iori Sakiyama
- Miyachika Kaito as Daiki Kikuchi
- Jiro as Fumiya Kishi
Supporting cast
- Maki Sakai as Misae Okahashi
- Yumi Adachi as Micchan
Episodes
This series spans 1 season with 6 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 6 | April 6, 2025 | May 11, 2025 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Episode 1 Yuri Kitagawa (Sena Nakajima), a high school student studying for entrance exams, spends her days alone, troubled by her tenuous family relationships. Her love life is not going well, and she is struggling to choose her future career due to her family's financial situation. One day, a "certain man" (Teruyuki Kagawa) appears before Yuri. Yuri begins to open up to the man, but soon a terrible "disaster" befalls her. |
April 6, 2025 |
| 2 |
Episode 2 Kuramoto (Matsuda Ryuhei), who works as a mechanic at a transportation company in Fukuoka, has a guilty past. He caused an accident while driving under the influence of alcohol, resulting in the death of someone. Because of that incident, his wife Kana (Sato Miyuki) left him, and Kuramoto, who still has feelings for her, tells his mother-in-law Ikuko (Kamino Misuzu) that he has quit drinking and reformed. Kuramoto faces his own mistakes and tries to move forward little by little. However, a "man" appears before him. |
April 13, 2025 |
| 3 |
Episode 3 Iori (Uchida Chika), a cleaner at a shopping mall, is shy and unable to find hope in life. One day, Iori meets and interacts with Minagawa (Fujiwara Kisetsu), who works at a barbershop in the same shopping mall. Minagawa also has a secret that he cannot tell anyone, and feels a similarity between him and the lonely Iori, and the two of them begin to grow closer. Then, a "man" appears before the two of them. |
April 20, 2025 |
Production
Release
| Original network/platform | WOWOW Prime |
|---|---|
| First aired | April 6, 2025 |
| Last aired | May 11, 2025 |
| Runtime | 60 minutes |
| Status | ended |