I don't hate Yohan and blond girl. Yohan looks sad, does he have a reason to act like that...

I don't hate Yohan and blond girl. Yohan looks sad, does he have a reason to act like that ? I hope so. Im not going to judge him until the end. Why did he change so much from when he was young.. ┗( T﹏T )┛