This drama just entered my comfort drama list, with its pretty casts, simple plot and a rather slow pace.
TFM aired along with AOS, and I have to say it was a great choice as the two dramas compliment each other wonderfully. If AOS is intense and nerve wracking, TFM feels like a calming and soothing balm, and by itself is a leisure watch you can enjoy in a binge or one at a time.

The plot is pretty much focused and centered at one important thing: the forbidden marriage. It expands from there, and the characters built themselves around it. Their backstories are simple and the drama arcs are not so complicated.
And what's funny to me is that the next episode teaser is pretty much a whole episode summarized with bullet points! This is the perfect drama for anxious people (me) ♡

Sometimes I feel like the main casts kind of holding back (?) like the acting could be toned up a bit, but overall it's still good and enjoyable. The tension is burning, the romance and easy companionship between the leads are very sweet. The drama is good enough to keep you on your seat, but will not make you agitated and stressed out for days.

Also Kim Minju!! is so pretty!!

Overall, I would recommend this if you are looking for a simple historical romance with a slash of drama