Love hurts when friendship only is possible
Sumire, the protagonist, is in love with a woman seventeen years her senior, Miu.
Of course it hurt that we could never love each other in a physical way. We would have been far more happy if we had. But that was like the tides, the change of seasons--something immutable, an immovable destiny we could never alter. No matter how cleverly we might shelter it, our delicate friendship wasn't going to last forever. We were bound to reach a dead end. That was painfully clear.
We do not love people so much for the good they have done us, as for the good we do them.
Love does not consist of gazing at each other, but in looking outward together in the same direction.
It is not a lack of love, but a lack of friendship that makes unhappy marriages.