i'm not sure why there's so many negative reviews because personally i enjoyed this drama very much, although there is cliché moments that people might not like; the relationships in this show is what brings it all together. i loved seeing the development of all the main characters and side characters. i think the show could've developed on some parts like adding more to the side characters story and giving us more at the end but other than that i would say this show has been an emotional journey. the only con i can think of is the ending, they disappointed me with that because i think the episode could've been stretched out more, possibly a wedding happening and how all the other characters improve in the future.
out of 10, i rate it an 8 because of those reasons.
asides from that i loved the cast, everyone is an amazing actor especially seo inguk who showed various emotions during this show and park boyoung who also did an amazing job. also dawon from sf9, i believe this was his acting debut and i'm just so overwhelmed with his performance because he did it so well! i'm looking forward to how his acting will develop.
i will end my review here by saying give it a chance! it might not be for everyone but i fell in love with it straight away and i'm so glad i watched it, so who knows? you might feel the same way too.