I have to say, even though I expected a bit more it was still an interesting ride. I don't think I have ever seen a kdrama, where the both leads (1st and 2nd) were the opposite gender but were not in a romantic relationship (except for Chief Kim, but the female lead wasn't really the second lead but more like the third lead, so basically the leads were both make in that one). I started this thinking we'd see Rain and Oh Yeon Seo in a romantic relationship but I am quite satisfied with their bromance (?). To be honest, sometimes the plot wasn't that planned or written out well, it felt messy at times and I skipped a lot, but I was still curious of what would happen, so that's a positive thing.
The actors did a great job though. I am honestly surprised at Rain's actin skills, he should definitely do more romcoms, it suits him incredibly well!
The ending scene was such an unexpected but cute scene that made my heart wrench a bit. I really ship Young Soo and Da Hye. And btw tht y'all notice that Seung Jae's wallpaper on his phone showed him and his mom and his mom was Maya! (but then i'd be weird if she fangirled about him, except she forgot who she was in her past life/she pretended)
All in all, in my opinion this show is very unique in it's character constellation and especially the chemistry between them.