ferom what i can gather without reading shit on the net
he's old kinda in retirement (which he's been doing like since he was 20 >_>, taken haruka to a orphnagae type thing on the beach
ppl are dicks on the beach so he beats them up probably gang related
goes back to town for lulz things have changed and ppl think he's old so he kills everyone in sight to show how hard the dragon of dojima is
theres obviously a lot of yakuza shit going on