A Love to Kill (2005)

Kang Bok Gu (Rain) is a K-1 fighter and a fierce person. Bok Gu is a vibrant figure who was raised in a foster environment. He falls in love with a lady he should not be in love with. Because of her, his emotionally wounded brother went off the roof and became a nursing case. As a result, his love is prohibited and, eventually, sad. Cha Eun Seok, a TV and film actress, is the woman in question. She did not jilt his brother on purpose, but his animosity for Cha Eun Seok gets stronger as a result of the misunderstanding.

Bok Gu maintains concretely exercising his retribution on Cha Eun Seok by becoming her private bodyguard. He merely wants to 'bring his brother's wife to her knees', He is progressively destroying Cha Eun Seok as his feelings for her grow deeper and deeper in his heart. Bok Gu is a cold-hearted character who has no regard for ladies. Hand-to-hand combat was only a form of escape he chose from the shock of a spinster's death whom he loved from afar.

Detailed information:

Starring: Rain, Shin Min-ah, Kim Sa-rang, Lee Ki-woo

Original release: October 31 – December 20, 2005

Link to watch: imdb.com/title/tt0499280/