the cast was perfect. the pacing was perfect until the end. the plot.... good enough, but not great. it started out wonderful; they tried to deliver a message. they failed in the last few eps. the build-up of showing the present-time characters amounted to nothing. we don't get an explanation as to what heedo is feeling. how she ended up getting married to someone else?? i can see that they tried to leave it mysterious alluding to the concept "not everyone is meant for each other. life moves on and so should you.". in reality it feels like lazy writing. heedo's present-time character does not connect to her past at all. as a representation they show yijin and heedo having an imaginary conversation through the diary, yet it is just a repeat of everything throughout the show. this led to heedo not feeling like heedo anymore with no explanation.