Not only have I binge-watched all 16 episodes in two days, but I also cried my eyes and laughed my heart out. Though it is true, that this drama does contain some minor plotholes and a few questions at the end, I think its strength definitely lies in its heart and story it's trying to tell. Honestly, I think that for a "heartful" and "youthful" drama it did an excellent job at finishing it up and there were way more connections than I expected. It's the kind of drama you want to experience once again right after you finish. It tells a story about family, friends, life's hardships, and most importantly in my opinion: Gratitude.

I loved seeing Eun Gyeol and Lee Chan chemistry, especially how Eun Gyeol kind of took on the "father"-role when he traveled back to 1995. Not only that, but the whole friendship with Ma Joo and the other band members was really heartwarming (especially after we come back to 2023 and they were still friends omg).
Some might say they had problems with the pacing, but I actually enjoyed how some things unfolded in the latter half (for example Cheon Ah's plot with her family). I was worried about the story, because at some point it seemed very messy, because no matter what nothing seemed to be working out, but somehow it did and it was satisfying enough for me at least.
Honestly, even though Lee Chan lost his hearing in the end, the story ended a lot more positively than I thought it would. The fact that Eun Gyeol's whole childhood and family situation changed, I wasn't expecting that kind of ending. But I appreciate it a lot, that they ended the story on such a bright note (even though I wished it ended with his family and friends and not with a kiss with Eun Yu).
So, about her! I wasn't really expecting another time traveler, that was cool imo (I haven't watched many time travel dramas, and those that I watched never included more than one time traveler). I kind of wished they had found out about each other a bit earlier though, and was I the only one that thought, that their romantic chemistry dropped a lot after they found out? Like, the chemistry was great before, but it just suddenly stagnated and they seemed more like friends after they found out (which was weird, but I thought they'd be happy, since it meant they'd be together in 2023 as well).

Other than that, I loved Cheon Ah and Lee Chan's love story (too freaking cute) and Lee Chan's grandmother! They also did a great job of highlighting the disabled part of the story and raising awareness.

All in all, I loved it so much! It made me reminisce about the youth that I never had (I feel like in asian schools it's totally different). It was cute, heartwarming, sad and fulfilling! A perfect youth kdrama that I'd recommend to everyone! I swear, you won't regret it!