One Warm Word (2013)

Both deal with affairs, the conditions leading to it and the consequences of it

One Warm Word is one of the best dramas that narrates formation of a love affair and its role in devastating the couples' lives.
Both represent a love affair with similar structural theme.
One Warm Word simply illustrates a love affair understandable for all viewers. The storyline is simple but very logical and amusing and instructional. Both benefit form best actresses who fabulously and strongly play their roles.
Both are highly recommended.

Similar plot line treated a little differently. Both the dramas deal with spouses cheating on their respective halves. While Temptation has a little melo and dramatic tone to it, One Warm Word deals with it in a more realistic way.

Both somehow depicts cheating and affair . In One warm word, female character is entangled with a crush to a business man and internal fight with her conscience to ignore or accept this crush.

+ both stories are revolved around cheating and marriage problems
+ the FL started to breakfree from her comfort zone, and meet someone to start warmed her up
+ i thought OWM is a POV of YDK in TWOM, because the wife of the man she is seeing is successful and has strong aura

Both dramas revolve around common themes like infidelity, friendship, tangled relationships b/w family members (due to scandalous affairs), authoritarian in-laws, mid-life crisis, etc
As usual we have makjang elements & clichés added but deep down the plots are quite realistic as they deal with human desires & instincts fighting wit human duties & social laws.
How our MC’s strike a balance b/w the above factors is the driving point of the plot & it gives us a lot to ponder upon.

Both the dramas have the same ML & a similar setting so if you liked one you may want to try the other too.

"The story of two married couples in danger of unraveling as the husband and wife find themselves attracted to other people."
It's also about cheating .
but it goes more deep: it's about life, conflicts between responsibility to family and feelings

(it's starts a little slowly so watch a few episodes before giving up)