It seems this series has a message about the younger generation, which lacks desires or the will to have intimate relationships, suggesting that "everything is fine, you can live with this distortion" without addressing the causes and roots of these mental issues.

Story
A story about someone who is unable to maintain a intimacy relationship with his girlfriend, and both of them have to deal with the consequences. In my opinion, it's a diamond plot that could have been polished to reach particularly interesting places without forcing a contrived ending.
A good few years ago, Japanese series sometimes ended with an open ending or an unsatisfactory one. Today, this is hardly accepted; they always have to force a happy ending on the characters, even if it feels contrived and not right.

Acting/Cast
I am referring only to the main actors because the rest did not interest me, and I skipped their scenes.
The main actor is stunningly handsome; it's hard to know his acting abilities since, in my opinion, he wasn't really given a chance to show any emotional depth. On the other hand, the main actress was truly unbearable, and her acting abilities were nonexistent.

Music
The series' song was so successful that it distracted from the boredom of some scenes.

Overall
I don't have a problem with it being an educational program about intimacy, as most Japanese series are like that. However, I felt like I was watching a Korean or Western series because they tried to impose very different values from those usually conveyed in the Japanese series I've watched. I didn't fully watch the ending, and I don't believe it's possible to be in a romantic relationship that remains platonic or in a relationship where one partner forces themselves to have sex just to please the other. It's impossible. A person without sexual drive cannot maintain a relationship with a woman who has natural desires and needs.

The attempt to present them as a normal couple at the end, thinking that if we just educate him to be different, it will work, doesn't work and won't work. It seemed like they were trying to force a contrived ending where a partner with needs can accept a partner without needs.

It could be that this approach didn't work for additional reasons, such as a lack of depth in exploring the emotions of a person without desires or his lack of understanding of himself altogether, as if it is a normal thing when it is clear that it isn't. There is something beyond that here.