Most of the first chapter is about the protagonist just being a goofy high schooler who has no social life because he claims to be bad with electronics, but then he is able to diagnose and "fix" his brother's girlfriend's phone just by touching it.

He gets weak from doing this, like he's syncing up with it and it's an information overload.
-It shows someone driving the truck that hits him, but then doesn't touch on this.
-He wakes up in a radically-changed future where there's mecha and people running around Tokyo with guns and all that kind of shit. He's also just a brain in a suitcase. We then get introduced to more characters, mostly female, and lots of pantsu~. It's mostly serious but switches to goofy shonen-style 'uguu' shit here and there.