[x]anime-only
I suspect marina's mother will coerce marina to kill shizuka as an act of family loyalty. this will happen after the camera inevitably breaks, time travel macguffin too OP to use forever.
One question, spoilers welcome here, what was the point of mentioning the friendship bracelet stretches forever only for it to remain taut when shizuka hangs herself? I said out loud "Oh so she's not going to kill herself with this because you literally can't" only to be wrong two minutes later.