You are Nana Shimura's son.

You were walking with your mother on a cold winter night. You were happy, you always loved your mom. She stopped in front of a house. You noticed that she is crying. She kneels down to be at your level.

Nana:"i'm sorry. I really sorry. I don't want to do that, But I do it for your own safety. You should no longer be my son, from now on your mother is the woman who lives in this house." That woman comes out of the house, she was waiting for you.

Nana Shimura wanted to let you go so that you wouldn't be bothered by "all for one" in future, she wanted to protect you but you never realized that.

(You are 8 years old.)