I will not write about surface story. But about what is beneath that. It was story about love. It start with very naive picture of love, that kind that (~15)young people have. That you just see someone and you know that that is the person. Then it evolves throughout the first three fourts of series. It becomes story about self, self reflection, self sacrifice, happiness, future... Things that many self aware young people think about. Things that I think about a lot. It develops both paths. Selfish/heart and more logical, but ironically selfless (You want good for more people that just you) path. We get taste of both of them, because every character has this internal struggle. The culmination of this was "cession" of "Pink hair" girl and then "espace" (heart) and "seclusion" (logick) of 2 MCs ("petite" and "Long boi"). These parts were very emotional, somehow sad but happy... simply just beautiful. It doesnt offer answers to your questions about love, of happiness ... but it beautifly depicts why and how you have them. Of course, storywise it had to end somehow. And it chooses the "you must understand and accept yourself to be happy" approach.
To sum it up: Great depiction of how meaning of love evolves, and how it gets complicated... Emotionally and allegorically beautiful. I really recommend to watch this after some harem ecchi anime to make yourself feel like human again.
