Onii-Chan, I Need You

It's been less than twenty four hours since the living victims returned from Heavenly Host and they're already crazy, all except for Yuka. When she visits them they have no memory of Heavenly Host. Sachiko returns to haunt Yuka, can Satoshi save Yuka even though he can't see or remember Sachiko? Will Yuka go insane or will she die first? Rated Kplus for now. Gore maybe later.