After watching hundred+ drama, it makes me feel bored, but with this drama, my excitement watching cdrama came back again. Each episodes wanted me to watch for the next episodes. It gives you feel that you wanted to solve the puzzle that entangled for the Main lead. Though the character of FL's best friend is quite annoying, she acted like a teen-ager not with her age. But of course you can skip those scenes.
The OST is repeatedly played in lmany scenes, even sad, happy, main leads moments and for the other couple's moment.
I just thinking how will you fall in love with the same face of your dead sister?