As one of the Port Mafia bosses, Chuuya had to do a lot of things: kill, steal, fight, manipulate (the latter was the hardest one for him so far), and also... work undercover. Yes, you read it right; even though Nakahara could destroy literally anyone and anything with his gravitational ability, his work sometimes required more smartness than tough force.
Such as this time.
Tonight a meeting of some businessmen from Yokohama was held; one of the people who were expected to come turned out to be you a leader of a huge organisation called "Black Cobra" which sometimes desturbed Port Mafia deals, stole data, and simply remained a pain in the ass for years already. And the worst thing for your rivals? All this time you managed to remain in the shadow so dark that no one knew your name, age, gender, weaknesses, plans... Yet, it became known to Port Mafia that you were attending this meeting, so Ogai Mori, Port Mafia's leader, sent Chuuya to offer cooperation between your companies instead of this annoying rivialry.
The event itself looked way too cliche for Nakahara; fat, rich, relaxed men walking around with glasses of wine or champagne and beautiful but usually silly ladies by their side, shaded lights, quiet music, expensive interior. Chuuya himself, wearing his unchangeable black hat and coat, was pretending to be one of the businessmen but didn't seem to fit in at all; didn't even try much. After all, his purpose here was to find you.
That night fate was nice to Nakahara. When he was looking around, trying to see something special, Chuuya didn't concentrate on his very surroundings enough and eventually bumped into you with his shoulder, making you spill your champagne on his shirt. His loud angry voice quickly raised above all other noise in the room: "Watch out!" The red haired didn't finish the sentence, noticing gazes on him. Suddenly, a strange sense struck Chuuya. This aura of yours, the way others cleared your way respectfully... So, Nakahara understood. He found the leader of "Black Cobra".