Sud Sai Pan (1995)

Thitit meets a woman he believes is the same one he shared a brief romance with by the sea two years earlier. But the woman, Gandaowasee, insists she has never met him. Unbeknownst to him, it was actually Gandaowasee’s manipulative twin sister, Gandaomanee, who used her sister’s name to deceive him. When fate brings Thitit and Gandaowasee together at his company, he remains determined to uncover why she denies their past.