The Fable: The Killer Who Doesn't Kill (2021)

Akira, a legendary assassin known as the Fable, lives quietly with his partner Yoko as siblings, working part-time at the design company Octopus. CEO Takoda and employee Misaki are unaware of his past. Meanwhile, Utsubo, a representative for an NPO, teams up with hitman Suzuki to set up an extortion target at Octopus. (Source: MyDramaList)