The Ep 1 rooftop situation is odd, but equivalent to kissing a stranger at a club. I think it's the unfamiliar context that throws people off of what is a fairly common event used in many romance stories. After Ep 1, it's actually a very sweet, trusting, healthy relationship with a TON of chemistry.

I also think some suspension of disbelief is required to enjoy this story! But again, that's true with many rom-coms. This is a light, sweet, and steamy (but non-explicit) romance without much angst.

The age gap didn't feel fetishized because the lead characters felt so compatible (physically and emotionally). The way they get together IS super fast, but also believable as instant attraction. The physical attraction is what gets them started, but as they continue, they learn more about each other and go from in-lust and in-crush to in-love. Both characters try to take care of each other in actions as well as with words and make efforts to communicate. What's great to see is that both characters gradually grow through their relationship. As they feel more secure with each other, the FL grows more confident and relaxed, and the ML grows brighter and relaxed (less reserved).

The FL is 22 and very naive. VERY. But I don't think she's dumb, I just think there's a part of her social radar that is oblivious because life hasn't dealt her enough lessons yet for that part to improve. It's like a translation issue: she *does* notice shifts in people's moods (she's especially aware of the ML), but she can't accurately tell what those shifts indicate. She likes to be helpful and to see people be happy, and treats everyone with the same genuine enthusiasm. She can't see how she might be sending mixed signals to some people because the concept is so far removed from her intentions that it can't even register. The ML understands this, and though he naturally gets a little jealous, he is more worried about her being taken advantage of than he is about her feelings wavering from him (which was also refreshing to see).

I enjoyed the clever ways the script had the FL's naivete turn expected clichéd situations on their ear; some of them were pretty funny. In addition to that, there were multiple times I thought "here we go" when there was prime opportunity for a cliche to start, but the screenplay would do something different. Not in a groundbreaking way, but still different enough that I would be pleasantly surprised.

I also greatly appreciated that though the FL character was completely inexperienced with intimacy, that she had a desire for it and actively participated. The portrayal was, I thought, completely believable for a 22 year old virgin, and easy to understand why she would be physical with a stranger so quickly if she felt an instant attraction. Though she's eager she also has moments of shyness and I love how the ML is conscious of how she feels/reacts and never forces her past what she's ready for.

The ML is 38 and *not* standoff-ish to the FL after the first episode. His growing affection is steady, patient, and occasionally lightly teasing in a playful way. He tries to alert the FL to social dangers and though he steps in to disrupt some situations, he does not try to dictate her life. Ep 3 has a couple scenes where their dynamic is written a little uncomfortably/imbalanced, but thankfully that didn't continue. The ML didn't feel condescending or like a father figure (which would have been a turn offs for me).

Both the desire and feelings the leads have for each other remain consistant throughout the show. There is a ton of skinship and making out, and even a couple kisses with a little tongue. There's nothing explicit though. The passion, affection, and sweetness feels natural, comfortable, and realistic. It's more satisfying than most JDramas (or KDramas) in that regard.

The secondary characters were mostly fun too. Nothing memorable about the music.

I watched on Viki and they had the 2 special episodes included with the main series. There's Ep 5 then an "Ep 5 Special" and Ep 10 then an "Ep 10 Special". The specials are basically recaps but done as the couple reminiscing together about their relationship thus far. It was fairly realistic, as that is something that couples do, but I wish it had given a few more insights into their thought processes than it did. The specials gives a little extra information, but they are not that necessary. The recap after Ep 5 was too repetitive when binge-watching. For me, I would have preferred to watch both specials at the end as a way to extend the good feelings from the show before leaving it to figure out what to watch next.

The story and characters may not be the most unique, but it was an easy, enjoyable, and satisfying watch for me, and I expect I'll re-watch again.

I also really like dramadesciples review:
https://mydramalist.com/profile/dramadisciple/review/152525
They have similar thoughts but say different things and summarize the lead characters and their dynamic well.