The plot was something new, yet simple and refreshing. It wasn't too complex like 'A Time Called You' (another time travel masterpiece) which I liked because I was never confused about what was going on or who was who. The drama was so beautifully-written that it was a great experience and it really felt like I was in the drama myself, experiencing what the characters were. As for the hearing loss part, the ending was perfect. As heartbreaking as I was during the climax portions, it was bittersweet to see how the writer wrapped up Ha Yi-Chan's story.

The casting was absolutely perfect, especially the younger cast who I was immensely attached to during the whole drama. The friendship between the band members and the girls was so natural, realistic and flowed so well. Of course the bromance or father-son bond is something I have to mention because it had me laughing so much- "I like girls!" lmaoooo. The character development of Cheong-Ah was a perfect pace- I loved seeing her character slowly break out of the shell both society and her family made for her. Seeing her accept and love herself, embracing who she is and learning that being deaf is not a flaw, was so lovely to watch that I genuinely cried at multiple points in the drama (also because of Ryeoun's amazing portrayal of a lonely and struggling son).

The only issue in my opinion is that I believe Eun-Gyeol and Eun-Yu recognised that they're both from 2023 too late for my liking. I think it would've been great if they'd had a least one or two episodes where Eun-Yu was just Eun-Yu and not Se-Kyeong. I was expecting them to "recognise" each other and help each other with their personal missions but it seemed more like an individual fight instead- which is in no way a negative but just not the route I was expecting.

Overall, this drama has everything you could want for in a drama: plot, acting, music, casting, ending. EVERYTHING was perfect.