So I'm not the biggest fan of Japanese dramas for different reasons, but this one is worth watching.
I'll mention my good and less good thoughts about this drama.
1. As I mentioned I'm not the biggest fan of Japanese dramas so I didn't know Mitsushima Hikari and Satoh harumichi, and boy, they are such brilliant actors. they have made me feel every emotion and thoughts that they had.
2. younger versions of harumichi and yae were so cute!! they definitely delivered the youth's first love, and every time that taisei (aka young Namiki) appeared on a scene, the whole mood brightened up! he's such a gem actor.
3. the story was definitely a cliche, but a good one. I was really afraid that yae's lost memory will ruin everything, but that wasn't the case.
4. Harumichi and his sister's relationship was so pure and wholesome. I loved their beautiful connection and understanding of each other.

Now the less favorite things.
1. younger version of yae did a great job, but I hated the fact the actress is way taller than the mature one. it just didn't make any sense lol, but ok.
2. I HATED the fact that harumichi cheated on Tsunemi. that was very unnecessary and didn't fit his genuine and gentlemanly character. I've felt so bad for her. she was such a sweet one.
3. the sex scene was unnecessary. it could have been easily a 15+ rated drama without this scene but whatever lol.
4. I know that it's probably an unpopular opinion, but I would have been totally ok if harumichi and yae wouldn't end up together. people can grow and move on with their own journey and the return of yae's memory was a little bit forced. also, their chemistry together romantically wasn't so great for me either. actually, the actor had better chemistry with Kaho (akaTsunemi).

overall the series is great. the cast did a great job, and the cinematography was beautiful.
it gave me the 'this is us' series kinda vibe, which I like.
it's a 9/10 for me.