Drama had great potential but they didn't execute well. The main storyline was great but the supporting character's storyline was just there to occupy time for the episode. It felt like lazy writing to me. If they made the other character's plotline more relatable, it must've made the series more of a masterpiece than it already is. Other than that drama felt dragging after ep 7, if the episodes were cut down to 12 rather than 16 then really I'd be more satisfied. Regardless, the drama explores the point that the main characters had serious relationships before they met each other. It didn't hesitate to deliver the message that loving someone doesn't have to be your childhood crush or your first love. You can fall in love again, maybe with the right person. Also giving the message of communication is the key, don't assume things of your own both leads did that and faced big consequences. In the end, lying isn't a good thing but rather than just looking for honesty or truth, you should understand other people's perspective, which was my biggest takeaway from this show.