"How past actions affects the future."

When he returns he meets Naoto, who has become a man and a police detective, which means he has managed to save him!!!!. Happy asks Naoto about Hina and sadly he replies that he couldn't save her. Takemichi devastated but not defeated, they set off together with Naoto to investigate everything about Tokyo Manji-Kai. 

They find out all about:

 Manjiro Sano 

and

 Kisaki Tetta 

the supposed leaders of the gang. 

But he is about to find out that this information was not always so...

Then with his heart in his hand he decides to go back in time to find out what solutions he has to save his girl. and then he shakes hands with Naoto and goes back to the past...