One Day (2017)

If you loved the quirky writer female lead Chun Woo Hee in BeMelodramatic...

.....you'll also love her also quirky character in the movie One Day!

Both BM and OD are very heartfelt and realistic (despite the sort of ghost aspect in One Day), that while happy and calming, will also make you cry in some parts

They both have similar plots, with ghost seeing main characters, there is also a friendship which blooms in both of these stories.