To be honest, I really like this drama but I have mixed feelings about it as a whole. But let me just say it's really a simple cliché love story with a few twists in this.

Things I've enjoyed from this drama:
- The cinematography of this whole drama, the color grading of each scene was just *chefs kiss*; it was so good I honestly loved it.
- The casts! Especially both the younger and older version of Yae and Harumichi. These four did a good job in portraying the main leads of the story. The cast of the younger version really did a good job portraying such a cute and innocent love. While the actress and actor of the older version, they are veterans in the J-ent industry and I really enjoyed how they brought the characters to life. Takeru with his micro-expression was so spot on and his yearning for Yae. While Hikari did a very good performance as Yae, I loved her acting especially during the last few episodes where it fleshed out her character's early married life.
- As a huge Utada Hikaru fan, I seriously love hearing her music throughout the series.
- There is a sense of nostalgia going through the series, and just reminds you of the good old days too. It hit me when I saw some old items I've used in the past and hearing the song Automatic.
- The way they presented the younger main lead's relationship. It really gives you the feeling of how sweet, innocent and pure first love felt. Honestly have enjoyed this part much more than the main lead's present storyline.

Cons:
- It is one of the few things I wished they got rid from the series. But it is an explicit 18+ scene on the earlier part of episode 5. There are a few nudity in this, so if you're uncomfortable with this... this might turn you off. Honestly the drama is really about the yearning and innocent feeling of first love, and I felt like this kind of scene was just out of place and not needed in this series.
- The ML's action during the present time. I was not happy with him cheating on his fiancée when he reunited with FL. For me I just wished he cut off his relationship first before making a move towards the FL. Also I felt so bad for his fiancée through this series, she tried so hard to salvage the relationship and she didn't deserved how things have ended between them both.
- The amnesia and 'villain parent' troupe being used in this series. These troupe just felt over-used for me. Honestly after the amnesia part started, I felt like I didn't much enjoy the following episodes so much. But that's just me.
- The FL's mother, honestly I seriously dislike her so much. If it weren't for her, the main lead's relationship might not have gotten worst.
- I felt the flashbacks and change to present timeline wasn't executed well in the drama. The change is just so abrupt, suddenly you would be confuse on what is happening. I wished that they mentioned what year the scene was supposed to be in.

Overall:
I think it's still a good drama despite it being cliché, the flaws and several frustrations. It did made me cry especially near the end. As mentioned I do like this drama and I can see a lot of people as well have enjoyed it. I don't think it's a series for me to re-watch, experiencing this one time is good enough. If you're hesitating to watch, just give this series a try and maybe you'll enjoy it as well.