I honestly wasn't expecting much from this series. I usually accept that these kinds of series are going to be a 7 out of 10 at max, and move on afterwards.
However, I really enjoyed this series. It's not perfect, but it's one of the most enjoyable out of the last few ones I've watched.

The leads have good chemistry, and they both look considerably younger than their actual age (27?? Literally how?), which makes it easier to believe that they are young and inexperienced. Their scenes together are adorable and carry most of the series. If they weren't there, consider 80% of the rating gone.
I also love that we got a decent kiss. Their first kiss is fine, but very kdrama-esque (as in, it's short, tight-lipped, and a little stiff) - the second one is great. Good job on that front.

The music was also a pleasant surprise. The first song specifically was really good, and even though we hear it multiple times throughout the series, I didn't get tired of it. The last song was also okay, albeit maybe not as memorable.

The production is great. The shots are really pleasant to watch, the color grading is immaculate, and their clothes tend to match their surroundings. It's just really aesthetic and visually appealing.

I think the weak point of the series is the story. At times it felt too dramatic and the characters weren't communicating properly, which was very frustrating. The main couple had like four big fights with the respective make-up scenes, which got a little too repetitive for me - Just talk to each other?? It's not that hard??
I also disliked the teacher the second I saw him, personally I thought he was attracted to Han Baram because of how touchy-feely he was acting with him. It made me uncomfortable, considering that the actor that plays him looks much older than the other two. And then he had the audacity to act surprised when Han Baram developed a crush on him? Like, be ffr, you were all over him a second ago.

Overall, I would for sure recommend this series. It's cute and (relatively) light.