Okay, let me tell you one thing : like a lot of viewers, I began this show with no expectations. At the beginning I even wanted to avoid 18 Again, I though it would be impossible to do a good 16 hours drama based on the American movie 17 Again. BUT I WAS WRONG aha. I just loved this show so much, even if it's not perfect. Yes it can be a bit slow, yes there is a love triangle, yes I didn't like the secondary couple (their story wasn't enough credible, it was a love at first sight pretty creepy but whatever). But overall, 18 Again is such an heartwarming and emotional k-drama fill of love (family love, romance, friendship) and comedy. I you like rom-com, If you like family drama, this one is for you. There are a lot of beautiful life lessons in this show.
PLUS: There is Lee Do Hyun in it. God, I didn't know this actor but he manages to be one of my favourite since the first episode. I'm impressed by his acting, he has a bright future ahead if he chose the good projects :) The others actors are great too, the music is very beautiful (Hello hello will make you cry for sure).