I like both the past and the present story (although maybe i like the present story more lol). For me, the present story gives this drama a good balance. The past story has a sad vibe, so it's nice to see a brighter vibe in the present story
This drama has much potential, but it's all wasted because it's focused too much on Cha Mijo and her romance (kinda annoying for me tbh). This drama will be better if it focuses more on their friendship, and it will be MUCH MUCH better if the 3 of them have equal screen time.