Pretty much everything Ryukishi writes involves people being murdered, so surely this will, too, right? I wonder how that'll come up in this... Maybe the old lady'll kill someone to get revenge from being banned from dropping her trash off. Or maybe these musician(?) guys'll kill the old lady because they hate old people.
Or maybe Karen'll trip on a rock and die, but everyone'll be super freaked out and convinced it had to have been murder, leading them to dismiss any claims that it was an accident. Then, the ever-so-famous "catbox" will be created when Izanagi and Izanami decide that everything sucks now and turn Japan back into water.