Sunset at Chaophraya (Thai: คู่กรรม, Khu Kam) in 2013 romantic-war-drama film directed by Kittikorn Liasirikun. Adapted from the novel Khu Kam by Thommayanti, the story is a love triangle, set in World War II-era Thailand, and depicts the star-crossed romance between an Imperial Japanese Navy officer and a Thai woman who is involved with the Free Thai resistance. It was released on April 4, 2013. One of top five box office hits (Thailand film) in 2013.Starring Nadech Kugimiya as Kobori, a Japanese Military Officer who is in the Japanese troop that invaded Siam, and Oranate D. Caballes as Angsumalin (Hideko), a young Siamese woman whose feelings towards Kobori are complicated by her strong, anti-Japanese sense of nationalism and her intention to romantically commit to a childhood friend upon his return from abroad.

The story depicts first love from the perspective of young characters, and how it affects their lives and their aspirations.Kugimiya and Caballes made their film debut.