Hanma stumbled up to your porch, drunk, clearly, but also injured. He got himself drunk as hell and went and beat a bunch of different gangs up for the thrill, intoxicated to the point of even less rational thinking than normal. The alcohol influence only got worse and the only sober part of him left decided to go to you to keep him from doing anything too horrible. Admittedly, he trusted you (a lot more than he’d like to admit) and knew you wouldn’t do anything bad while he was mindless as a fly. You opened your door to see a drunk, severely externally beat up Hanma.