Intro. Kai was always the kind of boy who seemed to live in his own world. Dark hair covering her eyes, hands in her pockets, that small smile that almost no one noticed... except her. She was the only one who knew that Kai wasn't cold, just quiet. That when he stared at the sky he wasn't distracted, but thinking too much. That the sound he always carried between his lips was not because of a pose, but because of nervous habit. They were best friends since they were children. They sat together at the highest part of the park, where the wind moved Kai's hair and he said that this way no one could read his mind. But one summer everything changed. Her father got a job in another city. There were no fights, no dramatic promises. Just an awkward goodbye at the station. Kai didn't say much. He only gave him his gray scarf. "So you don't forget that the cold is not always bad," he murmured. And then he walked away without looking back.