Going all in, huh. I still think this wouldn't be enough to protect Sanae or Takuto though. It feels like Shinju's already several moves ahead of Arata. He got backed into a corner having to finally fill up that marriage form.
He doesn't need to register it to the marriage centre. Just take that paper outside and burn it after she sign it. No one will know, if that shitty lawyer asking just said it has been registered.
it's like watching protagonist of the cure didn't get that everyone has been all turning on him. or maybe in case my hope got up. him mentioning "prince" seems like arata not stupid as he looks ?