The theme of the story was interesting, but that's the only good thing about this series, I'm afraid.
The plot had good potential, but the pacing and the portrayal of the characters ruined everything. For the first three episodes things were more or less stable, then from episode 4 onwards I found myself unable to follow the thought and emotional patterns of the characters. The way they changed their mind about certain situations or even about each other were not shown properly, so I found myself thinking "wait, how did we get here?" more than once as I watched. It felt like the writers were more concerned with showing Ha Ram's cute pursuing of Lee Jun than actually putting some care in their emotional growth and the development of their relationship. Things got even worse during the last two episodes, where I actually struggled to finish the whole drama (which is the reason why it doesn't even reach a 6 out of 10 for me).

The acting was decent from Lee Jun, but unfortunately I can't say the same for Jeong Ha Ram, who often looked like he was just faking his personality. Since Ha Ram wasn't explored in the least as a character, I was fully expecting some incredible plot-twist about him, but that didn't happen, so I guess that's just poor acting. Yun Do Kyung was the worst of all as he really looked like he was reading his lines out loud rather than acting.
The chemistry between the two main characters is not there either. The two of them never really bond with each other, so I wasn't impressed.
The production is nothing impressive, and the music isn't anything worth noting either.

Overall it felt like a waste of time. Can't recommend watching it.