I'm rewatching this for the 4th time and I'm still loving it.
It's a great drama, whatever they say, and the reason is simple: because it's well constructed. A quite easy pre-requisite but so many dramas lack overall coherence.
Its storyline isn't on the more sophisticated side, but because of that, they managed to make it work from A to Z without losing the viewer's attention, without making up weak plot lines to fill the 11 to 16 episodes like so many other do.
The story involves two ladies sharing the same name and a man messing up one of the lady's life, thinking she was the other one that he fell in love with before she abandoned him. He later realizes his mistakes and starts getting more and more interested in the one he didn't know.

So I was wondering why I loved it so much. I knew I liked it because it has some similarities with marriage not dating (same director) for those who like this kind of quick-witted strong female lead type. The lead actress, Seo Hyun Jin is really good by the way. When she cries I cry, when she's on the limit of losing her mind, I totally feel her. she's never too dramatic, never too cute, she's extremely relatable, and I think that's one of the reasons I was able to watch every episode without being too distracted, pause, or look at my phone.
Also this Director has a very convenient little trick to make the episodes sort of stick together well: each episode starts with a flashback and the whole episode is a series of actions leading towards it. It allows the viewer to focus more on the action expecting how the action will end up this up the direction the flackback went for.

But I think what makes this drama go to the funny rom-com to the rom-com you rewatch once a year are the side characters. One f the best set of comedy actors in K-drama land imo : we got COMEDY LEGEND Ye Ji Won, God bless her soul honestly she's the sugar in my tea, the sun that rises, the kimchi on my rice. Next, we've got Heo Jung Min, who's literally the funniest side male character ever I don't even care for your opinion, and we've got Kim Mi Kyung, another legend, the personification of the sassy K-drama mum. Loving the love-hate relationship with her daughter in this one. always defending her from the neighbors but also wanting to kill her.

All of the relationships that the characters have with each other, as dramatic and theatrical as being
(sister of male lead also the boss of female lead who's best friends from school made first male lead think he's life love long with the same name as the female lead was gonna marry the first female lead's husband but NO she just has the same name as her so first male lead decided to ruin his life and then feels guilty for the female lead) *BREATHES* you didn't understand anything? yeah that's the point. It's K-drama. but quite weirdly, the director makes it looks easy to get and digestible, as unusual and unlikely as the situation would be in real life.

Finally, the story gets an actual progression: every character gets to move on the situation they were in when we found them at the beginning of the series and find either maturity or redemption which I completely endorse.

It's overall such a heart-warming cringe free drama, maybe more for 20 to 30 yo viewer rather than teen, which also adds up to the credibility of the -HOT- relationship between the leads.

9/10 only because I'm tough. lol.