Touching and down-to-earth story just like its countryside settings. Paparotti's story is pretty typical in every way – teacher-student relationship, birth of a great musician, gang member turn something great, and a few more. But, the movie is still so alive and sweet thanks to our two leads. I love Lee Jehoon's character and his acting the most. His gestures, his dialect and the countless emotions he portrays are so real and most of the time so heart-wrenching even when he smiles. Casting him in here was the best decision of this entire production so far. On the other hand, his character's backstory as a gang member doesn't speak to me much even though I love his bond with his boss Jo Jinwoong's character. This gang story felt repetitive and not a single twist was added for flavor, and it was a bit far-fetched for a countryside high school setting. I know it's based on a true story, but in real life, he wasn't a gang member but merely a school delinquent who beat up his friends. The movie could've been fine that way too. I also wish it explores more into Han Seokkyu's background as a vocalist. So basically, the story focuses a lot on the bond between teacher and student without touching deep into any specific topic. In that light, it's a good story to watch on a lazy afternoon (with a box of tissue). Their teacher-student relationship was really sweet and gave me a lot of Gokusen vibe, and I always fall for stories of this kind. The music lived up to its name for being a music movie. The comedy was okay. Overall it was a down-to-earth story that grew on me over 2 hours of its runtime instead of being so fancy and in-your-face from the start. I cried a lot and I'm still listening to "You're the Person Who Gave Me Happiness".