The only way i can think the MC keeping the USB is that the author hide that he was actually a complete psycho that want to get off to it and actually enjoyed all the suffering he gave to his family, friends and now throwing the girl under the bus, but probably it is that he's just an idiot.
FREE FROM THE SHACKLES OF SIMPERY, BOY A RISES
now if only he'd given the fucking USB STICK COME ON, GIVE IT TO THE POLICE THEY AREN'T GOING TO LEAK IT.
Right now the issue is completely with MC since Sasaki herself was gonna come clean about everything but he's withholding information. Surely he could show the drive to the police and they could confirm without releasing any images to the public???
But he's still a traumatized kid so I'll give him some slack lol
Guess we just gotta see how this plays out.
But still, apologizing to the pedo rapists son??? Nah that guy can get fucked