Hazuki Family's maid Ine hands a letter to Ryo, who is restless from his Father's death. The letter was sent from a person named "Yuanda Zhu" to his father which contained characters he cannot read. Ryo begins investigating the letter to find out his Father's past. As he further investigates, he is targeted by "Mad Angels", the gang that runs Yokosuka Harbor's underground business.
Listen up. This book contains the keys to all
my important discoveries in martial arts.
اسمعني. هذا الكتاب يحتوي على كل اكتشافاتي
 .المهمة في الفنون القتالية
Hör gut zu. Dieses Buch beinhaltet
Escucha, este libro contiene
Escucha, este libro contiene
Écoute-moi.
Stammi a sentire.
Ouça. Este livro contém o que há de mais 
importante no que aprendi com as artes marciais.
Послушай,