Just as you think that things are unraveling a little bit more, the plot gets convoluted again. Nice.
I assume Shin, who didn't know what to do since his boss bailed out on him and left him with no directives, bailed out by ransoming Reika to her family. He asked for money in return for giving her location to the family.
It would certainly explain how Yoji (new character) knows who Tetsuo is. He is a member of Tetsuo's wife's family, here to pick up Reika (who is going to inherit the family business) from Shin who ransomed her because he didn't receive any orders about what to do.
@cgr Nevermind. I forgot about that.