My 4 categories are Acting/Cast, Writing, Direction/SFX/Music, Entertainment Value.

When viewed strictly as a "healing drama", it's pretty good. It's all about dealing with grief and guilt and learning to accept the bad things that happen in life, to forgive, and to love yourself again. I think it gets this message across well. If you expect a romance, it's disappointing. This drama really isn't about that and it takes a major back seat to the main goal of the drama. This is a bad thing and a good thing - bad because I wanted a cute romance with 김영광 (Kim Yeong Kwang) and good because the two leads really didn't have enough chemistry for a romantic relationship.

Acting/Cast: I watched this solely because 김영광 (Kim Yeong Kwang) is one of my favorite actors and this is another drama that shows the reason for that. His acting and his character carried the drama. He did so well in his portrayal of a cute, innocent, carefree, goofy young adult that his good acting only made the poor acting of other cast members more noticeable. Most notably, the female lead's acting was...stiff and strange. I'm not sure if it's the actress (since I've only ever seen her in Mystery Queen, which I really liked) or a directing choice. But, whatever the reason is, her "acting style" became increasingly annoying as the drama went on. I'll just give a quick example of what I mean: Someone will tell her something emotionally heavy (like a confession/apology) and she'll stare at them the whole time they tell her. Then, immediately after they've finished speaking, she quickly says something like "that's ok I forgive you/not your fault/etc." while still staring at them without any change in facial expression. It's as though she's just waiting to read her lines. But also, the lines don't even feel very natural as to how someone would actually respond. I also don't feel as though the female and male leads had much chemistry. Especially, when you compare the male lead's chemistry with his dad, his minion, and even with the lunch ladies. I even think the female lead's younger self displayed better chemistry with the second male lead. 4/10

Writing: Like I mentioned above, some of the dialogue from the female lead specifically, didn't feel authentic. The writers may have been going for a super feel-good story where everyone has super awesome communication skills and can understand each other as if they can read each other's minds, but it's not realistic. And really, I think that taking out the realism--using the characters to model healthy behaviors for the viewers--ultimately takes away from the healing message of the drama. It won't feel like something that's obtainable to the viewers because none of us are nearly that perfect in real life. By the end, I started getting bored...I felt like I was watching an episode of Full House or Barney or an after school special. Regarding the fantasy aspect of the plot, it remains a mystery - there is no lore, no rules, that can help us make sense out of the situation. That's ok, the story isn't really about that either, it's about the healing. But, I wish we could have just made peace with that right away instead of being given the run-around in the beginning, thinking we can figure out what's going on. The focus should have only been on her younger self's purpose for showing up in the future instead of wasting time on how she can go back. 3.5/10

Direction/SFX/Music: Like I said before, I don't know if some of these issues are directing choices or bad acting. I want to blame the direction. Music was nothing special. Regarding SFX, no issues stood out. OH YEAH...this bothered me...So there's this scene in the beginning where the female lead is outside in the sun, in nature, around wild flowers taking photos and she has her hair in a long, single braid over her shoulder. She also had these freckles that go well with her look. I'm sitting here literally thinking about how beautiful her hair looks. And then, later on, she's basically told she's ugly...so she gets a makeover, cuts all that pretty hair off, and replaces it with a short, flat, predictable hairstyle and covers her freckles with concealer. I was so annoyed. Actually, now that I think about, that's when my interest in this drama started declining. It's like that was a metaphor that signaled that they were removing the personality out of the drama. 3/10

Entertainment Value: It was a rough start, but the male lead single-handedly kept me from dropping this drama in the beginning. The younger self character and her relationship with the female lead grew on me and helped me keep interest in the drama. In the end, surprisingly it was Anthony (the second male lead) and his story that kept me interested in finishing the drama. So I guess, the baton was handed off a few times during this race. Ideally, everyone should be running together and crossing the finish line at the same time, but at least I was able to make it to the end. I was pretty bored through those last few episodes though. 3/10

Overall, I gave this drama a 3.5/10 mainly due to the weird acting/dialogue in the second half of the drama, the lack of chemistry between the leads, and the lack of interest I had toward the end. However, I think it had a really good message as a healing drama.