Akagami Aogami who appear from a toilet & asked "Do you want red paper or blue paper?" Answer Red: blood will rain from ceiling & you will turn red Answer Blue: you will turn blue because you will be strangled Hajime Aoyama choose yellow paper: will be dragged into spirit world & can never come back to the real world. In order to save him, She needs a jar & drew a mark of shinto shrine gateway with priming water & chanting the cursed spell then the spirit will be captured.