Honestly, the story develops pretty much like the name "step by step". It is definitely slow burn and demands your patience for the romance to blossom. But I will consider the fact that this is not the story of a couple living their love-life, but a couple (or two) navigating through their life to their ultimate love .
If you are into stories which you can relate to in your life, this one is for you. There are no lies here, it shows life at its realest form. No exaggerated scenes, no unbelievable happenings.
The actor portraying Jeng is the cherry on top of the cake, he's such a natural actor. He perfectly shows the emotions and confusions and awkwardness of his character and is a delight to watch.
A little unclear about how the side couple's story ends, but probably (hopefully) its for a second season.
Totally recommend, its worth it.