Is there any chance everyone is massively overthinking the car accident and it's as simple as all 3 were in the car? Akira only survived cause he was in the back, maybe the other car caused it, maybe they were having a fight, we do know that Akira commenting on Sekai's perfume pissed Nozomu off so maybe he suspected something, maybe he full blown knew but put up with it cause he was fucked in the head, who knows? But do we really need there to be cut brake lines or conspiracies of any sort? Could the accident not just be an accident?