

45 minSeason 1 • Episode 9
LatestYamihara Kokoro and Asada Toramatsu live in a town that is quite peaceful, until a serial murder case happened where the bodies all had their blood drained out. Five years have passed but the case remains unsolved. Meanwhile, Kokoro and Toramatsu have been in a relationship for a year, but are unable to get married as they are keeping a serious secret from each other. Kokoro is actually a vampire. However, she does not attack humans and live modestly. Toramatsu is a popular resident in the town and is trusted by many. After getting a divorce, Toramatsu got drunk and went back to his old house, where he met Kokoro, the current occupant. As the two continue to keep their secrets hidden, a horrific murder occurs once again in the town.
Acting
Takahata's thousand-yard stare could shatter glass.
Writing
Romance and procedural somehow make toxic sense together.
Direction
Kanai frames dinner scenes like crime scenes.
Trivia, insights & behind the scenes
The 'vampire as domestic partner' trope exploded in J-drama post-Twilight, but Unknown roots it specifically in rural Japanese isolation where everyone knows everyone's business.
Keita Machida took the Keisuke role specifically because he wanted to play against his usual cheerful type; his brooding silences were apparently improvised on set.