Responses
So in the extra, both the kid and adult are the dad. He was physically abused by his dad as a kid, that's why he locked up his son (Sakuma) so he wouldn't be able to abuse him like his dad did to him. The butterfly in the box represented Sakuma, who was locked in with the purpose of protecting him, yet it broke him instead.
Did I missed something..?.... Like everyone down below saying.. It was quite dark...!?
In the extra pages.. Is it the dad or big bro... And what's the deal with the butterflies... Like in the box and all..!???... I am confused... Who actually did that to those butterflies..??