The Lie (1998)

Original title: 거짓말

Joon Hee is a professional designer that enjoys a fulfilled life with his wife Eun Soo. However, their seemingly perfect relationship is put to a challenging test after the couple discovers that Eun Soo is unable to have a baby of her own. In the middle of the whole conflict Joon Hee starts to develop feelings for female manager Song Woo, which puts in motion a passionate triangle relationship.