Help me, please

I read this manga yesterday, but I didn't finish it because yesterday was too late to finish it. I remember it's about the hat maker who met with someone younger (10 years younger) that has black hair. He met this young man when it was raining for the first time, and met him again when he was in bad condition and it was raining too after the young man said good bye. After the second meeting, the Mc let the young man to stay with him and work as a model because in his hat shop, he only has 2 workers exclude him.
I remember it was canin: the hatter. But when I tried looking for by typing canin the hatter, I didn't get the answer. Could please help me? Thanks in advance