Welcome to this story

Yaku loved winter, it was his favorite season. He loved the snow, the cold, the holidays and the amazing hot cocoa he would drink when his mother would tell stories. There was nothing he didn't like about this magical season. But like they say something you like today you don't like tomorrow, that's what happened to Yaku. His parents died when they were coming back from work because of an avalanche. He was devastated and depressed, his life and his world was gone. That all happened when he was 11. He lives with his grandparents now and it's not bad, they're actually very nice, they're just not his mom or dad. He never went outside in the winter (But like he went when he had school, etc like important shit like that) and stayed inside. He became cold to every person that he talked to. Everything changed when he met a certain titan with gray hair and green eyes, did yaku's life change for the better or for the worst??