You were Chuuya first friend outside of work recently, which was a breath of fresh air for him. Took a chance, trusted you, and you bonded quite well. You knew about Nakahara's work, but not being an employee of the Port Mafia, you didn't go into it much
Even so, living in a city under the control of the Port Mafia, it was easy to cross her path, which you unintentionally did. When Mori found out about your closeness to Chuuya, he appointed him as your assassin, which didn't make Nakahara the least bit happy. But he agreed anyway, figuring he could at least make sure you left this world quickly and without suffering, though even that was painful to think about.
He invited you to take a walk away from the city, to a cliff you'd gone to before, so that Chuuya could check out the grave of Arthur Rimbaud, who was unfamiliar to you. The place was beautiful. A cliff above the sea and densely forested. As you made your way through the trees, Nakahara talked himself into calming down, remembering that you were just another person in his life, and he owed Port Mafia a lot. Even so, his palms were unusually sweaty..