hopefully, it won't be spoilers...but random posting since I have nowhere else to post...
@ktcjdrama ~ tango isn't a typical cheating drama. infact, it basically starts in one place and then goes off in unexpected different direction. the drama is not really meant for binge watching. I got bored at one point and I basically cheated by watching the ending (and was like "what????? ") and then went back and watched all the episodes in between... hahahaha...
so each ep is only about half hour or so and it has basically "the past" and "the present" -- they are both chronological (so no time jumps) and it is easy to follow. the past contains 3 years and the present/aftermath has 2 years. so I sort of had to laugh but in the end, the basic theme/message of the drama seems to be -- don't hold on to unhappy marriage/relationship that isn't working. get out and end as friends! .. so not the message we usually see!
from the beginning, it is obvious that the cheaters are actually madly in love but this is a sort of love that will destroy both of them. and it does rather gloriously though not in the ways one would typically expect. one almost feels sorry for cheater girl by the end but at various points, you want to slap her for all her lies and so by the end, you just sort of shake your head at the mess at she is in from a detached view. cheater guy turns out to be far more manipulative and selfish and I was shaking my head and wanting someone to slap him for his controlling nonsense ways. he also has a dark side which takes the drama in a very different direction than one would expect.
but honestly, both of them are ridiculously stupid. like one character asks -- so if you love each other, why aren't you divorcing your spouses and getting married? what is this ridiculous affair? .... this is a question that never really gets answered; perhaps the simple answer is both are selfish and too lazy to break their lives? in the beginning, these two are almost giddy and enjoying the no-strings relationship. basically they feel like it is the only place where they feel alive. gradually, they start getting possessive of each other and expecting more. but neither are quite willing to divorce and start together. so who knows why. their so called divorce attempt is just pathetic and so the affair goes on for 3 years! by the end, cheater girl desperately wants out but is stuck with cheater guy who refuses to let go (you will find the reason and it is not what you would expect).
the spouses start off as typical kdrama second leads -- the kind supportive types who turn out to be quite gullible because they believe the nonsense the cheaters tell them. the lies and level of deception are amazing because the two couples are actually friends!!! so the cheaters basically manipulate the spouses like puppets -- even when the spouses know something is wrong and suspect an affair (but they are not aware of identity), the cheaters convince these two that it is just marriage troubles!
both the spouses also end up having more darker flaws than is typical in second leads as they deal with the aftermath of finding out about the affair. so in the beginning, it seems like these marriages were pretty good till the cheating happened but the truth is both marriages were teetering on falling and were never strong to begin with. the spouses loved the cheaters but for the cheaters, it was mostly a marriage of convenience. by the end, both marriages are failing but the spouses don't really know what to do or whats wrong..
so the aftermath is interesting as the two spouses become very close friends. unlike april snow, there is no direct romantic relationship between the two of them though they dance quite close to it. the end is kind of an open ending where it could possibly go that way or they may remain friends. because of the culture, there is no kissing or super making out but just hugs and some forehead/cheek kisses. however, the chemistry in the two couples are still strong even without the skinship.
all in all, the unexpected dark twist makes the drama far more interesting than a typical relationship drama.