searching for a manga

I remember reading a manga a while ago and really want to re-read it. I think the mc was taking care of his sister's child after she died in an accident together with their parents. In the past the mc distanced himself from his parents bc they found out that he's gay and didn't accept it (maybe just the dad didn't accept it). At the end of the manga he returns home to sort out some things and realizes that his dad still cared about him bc he found something that his dad had collected or kept about him.

Thanks for the help :)