The story is an 8.5 because it is very cheesy and lacks originality but it's like watching My Annoying Brother, the plot is simple to read but once you actually watch it, yeah it's predictable but they hit you with so many more layers you were not expecting. I mean, it only looks like it's about a used-to-be boxer in need of money who finds he has a autistic brother that has savant syndrome. The movie has a few more layers that make you really cheer for joy that there is more to it than what meets the eye. The story is a nice comedy movie but it's comedy that is realistically funny and not overly used to make up for anything, The main story is helped by a slight side story that hits you with a character that you don't know whether to cheer for or hope she has presence later on. Also, I felt like I was watching a movie from a few years back with how the movie is shot. I am not saying it as a negative but as a warning because it does feel years older than 2018, maybe 2012-ish to me.

The acting was great. I have come to realize that characters with Autism in K-drama's and movies are the best I have seen yet. Park Jung Min who played Jin Tae is a great actor with a very wide range of skills from his other role. His big and small actions spoke to me the most in the movie because he captured the general sense of Autism with another small world of complexity (basically, I loved his portrayal of an autistic character with believable tendencies and savant syndrome).
I have to say Yoon Yeo Jung is probably one of my favorite aged actresses because she can do anything but the character that is headstrong but fragile and tries to hide hardship is my favorite of her characters. She did it again in this movie and I really hope she does many more.
The only one I had a problem with was Lee Byung Hun. Don't get me wrong, it wasnt his acting I had an issue with, it was the character. The character begged for more complexity. His character was dynamic but it took me so much to understand what he was doing and for his change to happen that, it didn't sit well with me. You may disagree and I don't blame you, it's just what I feel.

I love classical music so this was an amazing assortment of pieces. The music was great and I really enjoyed it but it gave off the old vibe again which I really hoped it wouldn't but it worked with how it was shot. I have to say, the music will certainly not turn you away from this movie.

Overall, I will most certainly watch this movie a couple more times to catch other aspects I may have missed and maybe I will come to understand the character I didn't so much like a bit more. I think you should watch this if you liked My Annoying Brother, I obviously did (at first for D.O. but later on for the plot).