As a fan of the original movie but hating the weird incestuous age-gap parts of it, I was excited to see what the drama had to offer.
This one is amazing beyond compare. It delves into themes of family and love. It's a heartwarming romance with real struggles. The acting of Lee Dohyun is essential to the series, and he does amazing at both having that dad energy and youthful energy when necessary. Kim Haneul also does her acting well of having to balance the real weight of these struggles but bearing through it. All the main characters feel genuinely kind to each other which makes them easy to root for and helps with the heartwarming feeling.
However, you really feel the sixteen episode length. They're adapting a 90 minute movie into sixteen episodes that are around an hour long, but they definitely could've cut down to maybe 12 episodes or even more. Some of the sideplots are pretty insightful and nice in their parallels, but some are just pointless and resolved way too neatly. In some ways, the main characters are too perfect so the 'bad guy' tends to be someone we don't really know or all the problems are focused on them.
That being said, would still recommend. Umbrella scene lives rent free in my mind.