I would say give this drama a watch and see for yourself if you'll like it or not. To each their own.

So.. I like the concept of it. The idea of the letters and the main female lead wanting to find the guy who wrote the letters is interesting. She wanted to find the guy who wrote the letters to show off to her sister and also beause well she likes him a lot so she rejected all other guys she went on dates with. She wants to start her own company and is inspired by do san because of it so she goes and works on a start up. So heres the thing. As much as I enjoyed it at first as it goes on it kind of goes down half way. They don't focus so much on the start up which seems to be one of the main things and after awhile the letters and everything brought up in the beginning are forgotten. The "do san" from the letters which happens to be han ji pyeong gets rejected. It doesnt make sense because everything dal mi liked about "do san" was based on the letters. She rejected every guy because of the letters. They did han ji pyeong dirty. He was an orphan who had no one and on his own had to work towards his position he finally has a chance at happines and it gets put down because dal mi likes the real do san just because? It's not even a good reason oh and in addition to that the real do san crying says he needs dal mi because he has nothing? He has two loving and supportive parents, a house and friends. Han ji pyeong had nothing of that. They play it up as if han ji pyeong is the main lead only to later just have do san be the lead. And then at the end dal mi ignored han ji pyeongs confession and how hurt he feels and just goes straight to what she wanted to tell him. So as great as this drama started off eventually everything that they brought up in the beginning just kind of is put aside and they do their own thing to try to get us to like and root for do san more than han ji pyeong. They try to make Han ji pyeong as the villain and honestly this drama was pretty disappointing to me I couldn't even finish it. I didny watch the last two episodes and while watching it i skipped over scenes with do san and dal mi.