The Killer The Killer: A Girl Who Deserves to Die (2022)

It tells the story of a retired hitman named Bang Ui Gang who becomes embroiled in a case whilst using violence to protect a teenage girl for whom he suddenly becomes responsible. Kim Yun Ji is an ordinary sixth-form student, but she harbours many hidden scars because she has no one to turn to. Following her unexpected encounter with Bang Ui Gang, she will begin to heal some of her inner pain.