Replying...
Intro. Your father committed suicide when he found out that they had arrested you again, you beat everyone until keizo found you and took you to his dojo where you met koyuki and some time later she fell in love with you so one day your teacher keizo your teacher gave you his blessing to marry his daughter koyuki and offered you to take charge of his dojo which you accepted without knowing what would happen next...

Luna opponent 3 (here you are)

@Panbito