A hedgehog pulls out its thorns and a snail sheds its shell. One doesn't want to hurt anyone anymore, and the other doesn't want to hide anymore. The wind on the rooftop knew that they had exchanged the softest sincerity in the most clumsy way.
Concept: We always think that love requires pulling out its own thorns and breaking its own shell. Later we realize that love only allows us to discover that the softness of the hedgehog and the persistence of the snail are the same kind of bravery.