In Seo-Bok, the namely main character only knows his mom, and the lab he was made in as a clone of course. As the second main lead portrayed by Gong Yoo does not have much time to live, and he is technically immortal, through the lens of each other, they figure out the meaning of life, death, and maybe sleep :)

Bo Gum's acting was so great with the balance of puppy eyes and anger. For this reason, I believe the plot could have been taken further and the movie could have been longer and still enjoyable. The matching of him and Gong-yoo was delightful, so I do wish they included a bit more lighthearted, comedic scenes, but the meaningful conversations will suffice.
The use of music felt a bit excessive at times, making things feel quiet and slow and I felt like it took up too much of the movie. I also feel that a different, more joyful ending could have taken place since we don't know the path Gong-Yoo will take from here. All in all, this movie could have been taken further, but it was executed amazingly nonetheless.