They took an ok movie and turned it into an amazing drama. 17 again is a fun little film, but despite the seemingly deep story it tells, it is mostly just fun. With a lot more backstories for the characters, several more side-plots, a gorgeous OST and superb actors, 18 again is deeply moving.

Lee Do Hyun's performance is outstanding and he made me cry several times. My two favorite scenes being when his son hugs 18yo him for the first time and when his father comes to watch his basketball game and he communicates with him in sign language. He is a brilliant actor and completely had me believe that he is a 40yo man in a 18yo body.

It's overall a great drama with a talented cast and good writing but Lee Do Hyun and the OST are what make it outstanding. It also has well-chosen ending scenes that will make you click "next episode" immediately.

The only reason I didn't give this a ten is that there were one or two unnecessary side-plots that went nowhere (like the stalker).

I want to write a longer review but I haven't really sorted out all my feelings yet.