This story feels very much that of a thriller/suspense story. How? It gives you very subtle hints that gives off messages on otherwise non-sensical things. What does a sniff on a coconut symbolize? Nothing. Not unless you're in the context of I Told Sunset About You. How about the colors of the hibiscus? Well, same answer.

The writers' ability to create subtle things and make them points of exposition is amazing. Truly a work of art.

The color grading is that of a sunset. Yes. It creates a feeling of beauty, peace, and end. The shots are amazing (especially the underwater shots). Each action made and each dialogue said feels like its there on purpose.

Oh yeah, I forgot about the OST. The OST is probably one of the best ones out there. One is focused on fate, one is focused on confusion, and one is focused on confession, all reflecting this series' story.

Do I recommend it? Hell yeah.
Will it make you cry? I did not cry for this one (I rarely do cry on tv shows) but yes. I've heard people crying over this drama.

P.S. Watch the documentary too. You will fall in love with the crew.