Love Affair(1996)

Original title: รักเอย

Tee often has argument with his wife Tom, who he has just recently married. Tom decides to fly to London. Tee goes to Chiang Mai for his sister's birthday; there, he meets a young and pretty girl named Jow-noi, and Piak, a young man who was adopted and supported by her father. Tee and Jow-noi fall in love; Piak backs them up even though he is himself secretly in love with Jow-noi.