This is literally the best drama I have ever seen and mind you I have seen many ?
Now I should tell you why, because it has everything you need in a drama. It has cute moments, frustrating moments, moments that makes laugh so hard that the person next to says that you have gone mad ?and it has that emotional moments which will tear you up ?
I loved that-:
1) They had a good storyline even though it is time travelling which I don't personally like but this made it good
2) Good backstory for each main character though less for supporting characters but it's ok
3) The music is main why I started to watch this (second is the funny clips though which fully convinced me ?) I felt that when the ML said in first ep that music is the only legal drug there it is for me too and I always wanted to learn guitar
4) Last but not the least the new things which we get to learn from this I know there are more movies about sign language and about deaf people but I always like to learn new lessons they teach us.
It was a perfect drama for me as it ticks all my boxes which I seek when I see a drama.