I was more drawn to their story for obvious reasons. The 2nd couple felt they lacked communication on some levels. I really liked Sanwoo's personality tho. Wish the story delved more into their life esp the cliff hanger at the end. As much as I love open endings, the 2nd couple needed a proper ending cuz their story wasn't explored much. Would have been better if the author had stuck only with the main couple.
Nevertheless, an amazing read. I loved it :)
I just wish the crazy ex guy just goes away for good! He has already done a lot of damage.