[Give him a minute to get his thoughts together. Things are connecting too fast for him to keep up, and while it still hurts that Kaito didn't tell him...he thinks he can forgive it]
...so many things make sense now, but... [He shakes his head helplessly] I spent my whole life thinking I knew you...and now I'm not so sure... [It's kind of like the bottom's fallen out of his world and he's scrambling to stay in it. What's left that he can trust?]
...I'm...I'm still me, right? Even...even if I'm not actually your brother...b-but your son...right? [It's a question that doesn't make sense, but with Akito, those are always so much more than they seem to be. He's desperate suddenly, desperate to know that even if his life's been a lie, that the bond they have...had?...that is wasn't. That even when he was lying about who he was, that Kaito still loved him. Because no matter what the truth is, Akito needs him still]