When I watched it the first time I cried the last 10 minutes because it was reaching its ending and I hadn't had enough of this beautiful relationship.
It's "a slow, serious love" - like the author says, and I couldn't be happier about it.
This is not necessarily for teen girls or gay males, it portrays a pure love, even though it has boys' point of view, you could change either character for a female and the feeling would still be the same.
I love everything about this, except for how short it is, but I just finished all the manga related to the story in 3 days because I couldn't live without more.
Perhaps I'm raising the expectations too high, but this deserves my first review since I can't stop thinking about it and had to say something.
I hope you like it as much as I did, and watch it as many times as I have. I know the author won't read this, but I want to thank her anyways for bringing all of this joy to my life. <3