At fourteen years old, Yokosuka Megumi is Joe's younger sister. She has been living independently in an orphanage since their only family member, her brother (Joe), was taken away from them and given as an adopted child to someone else. Although Joe fears that the same fate may befall him on his own, he loves his sister dearly and wants to protect her from any harm. As a result, Meg has decided to live her life independently in order to avoid becoming a burden on her brother.