Cha's Counterattack!.As Kujira has trouble with her father thinking she's a boy, Cha Chi returns from China issuing a challenge to her. Eight years ago, when Kujira was under the assumption she was a boy, she made a promise with Cha Chi that if she could defeat her in a duel, she would become her husband. Cha Chi however refuses to listen to Kujira's revelation that she is in fact a girl and continues to fight. Kujira eventually defeats her, but not giving up, Chi decides to enrol in the school...