I think.. That was his big bro.. Not the dad.... Or did I missed something...
I think its the dad. during flashback he said that his dad always lock him up in a box and in the extra the person said he lock the things that he likes and precious to him so i think its the dad
Damn... That messed up... I just finished his bro story and now that I realized... They need therapy....
so the brother has its own story i didnt know that ill go read it right now
so the dad was abused physically and he somehow abused his son mentally without realizing
that's so sad for both of them ╥﹏╥