in my opinion this drama has such an amazing storyline for not only the main characters but for all the side characters as well. you can tell they put a lot of thought into their characters as well as their development and made sure that every storyline was perfected. to me they were all the main characters since every one of their stories kept u hooked. would totally recommend to this everyone. it's such a lighthearted drama with not too much problems/ angst (just the right amoun) and it's totally bingeable. also the ost omggg i love it!!! ANYWAYS MUST WATCH!!