I have a love-hate relationship with this drama. I'm going to break this review down into sections: Plot, Acting & Characters and Other Stuff.

PLOT: - It okay. I can't be more straightforward than this. The beginning felt like the middle of the drama. It was confusing. Apparently, the male lead already knew the female lead, but we don’t know how. It’s a drama with HUGE loopholes. Plus, there’s no real substance to it. Yes, it’s slow. But I don’t mind that. One Spring Night was pretty slow, but it was also good. This, one the other hand, is not. You have a guy who is obsessed with his past love. That obsession is creepy AF. But he gets over it.
There isn’t any AI stuff other than a device which when given a sample of a voice turns into a brighter version of the person whose voice it is using. The device sort of becomes that person – with their memory as well. Being a computer science student, I honestly don’t get how this algorithm is working. How does just a sample of somebody’s voice give information about their past?
The romance is cute. It is also the only reason I’m still watching the drama. Both the leads are experiencing the world of dating for the first time. So, they’re awkward but also straightforward. It’s cute and the chemistry works well. Their romance is calming.
ACTING & CHARACTERS: - All the characters are obsessed with one thing or another. Moon Ha Won with Kim Jisoo, Han Seo Woo with Ha Won and Jisoo, Moon Soon Ho with Kang In Wook and Kang In Wook with Kim Jisoo. Overall, all, all except Han Seo Woo are weak. But I guess the worst characters are Kang In Wook and Moon Soon Ho. I just don’t get them. They seem forced characters and if you took them out, the drama would flow just fine. Kang In Wook is an extremely despicable character and Moon Soon Ho just needs to get a life. She has no role and no purpose of her own.
Acting wise, they’re all doing a good job with what they have. But I do feel like this is Jung Hae-in’s third drama playing a hopeless romantic. It’s a shame because the guy is capable of doing so much more.
OTHER STUFF: - The OSTs are all nice. The editing goes with the vibe of the drama. I love Han Seo Woo’s wardrobe. I also love how aptly they used the colour green.
Overall, I’m watching it for the romance only. I’ll update this after the ending, but I wouldn’t recommend. I honestly think Jung Hae-in made a mistake doing this drama.