Story: There was nothing new, but, still impressive. Timeslip was done pretty well. The story is basically about how depression affects someone's and also loved ones' life. It highlights how the trauma and its results never disappear from the soul and affect daily life, but the pain is still recoverable.
Acting/Cast: Loved the chemistry between the leads. The acting was on point.
Music: Not impressive, but good enough.
Rewatch Value: I don't plan to rewatch it because I don't think my heart can take that sadness again.

P.S.1: When Na Bi attempted to take her life, and Minho told her not to do it, I couldn't help but think about Jonghyun. Moreover, this drama aired in August 2017, just before he passed away in December. I wish Minho had a chance to say "하지마!" to Jonghyun before he took his own life too. My heart is broken. TT

P.S.2: This is definitely one of the best short K-dramas I have ever watched. I wish K-BL makers look up to this drama and believe it is still possible to make a good one with short screen time. ^^