Adeus, Querida Esposa (2012)

it similar in how the couple may seems to have a happy marriage but that is not true b/s the guy is still in love with his first love, and then the wife start feeling angry and lonely, and then a guy appear to be his rival. the married couple both have other partner that is making their love drift apart

The stories are similar. However the only difference is that in scent of a woman its about the female lead and in goodbye dear wife its about the male lead!

in how the husband feel like he have an unhappy marriage and start to fall in love with a girl in the past, and the wife will also have another guy chasing her too.

It's also a triangle and that too after marriage. The ml and fl get married though not in love and later appears the sl who also is ready to accept the fl