(From the manga)

Satomi: When I was a child, Bungo borrowed my doll. He has a little sister, so I thought it was for her. It was my favorite...

Satomi: When I got it back... its feet had been cut off at the ankles. Understand...? He's that kind of guy.

Satomi: You... you want to be able to keep <b>running</b> don't you?