Corpse Party: Book of Shadows

The end is nigh! Behind the truth of Sachiko's death lies a cruel and tragic past...The students of Class 2-9 struggle to hold on to their sanity as they fight both the ghosts of the school and the ever-encroaching Darkness that seeks to turn them against their friends. If they can't solve this mystery soon, it'll be too late! When living is this hellish, is death the only way out...? (Source: Yen Press)

This is a pre-order bonus of the limited edition Japanese version of Corpse Party: BLOOD DRIVE. After Ayumi Shinozaki's failed attempt to resurrect her friends, she was hospitalized for her major injury. A mysterious woman appears and claims that she is an acquaintance of Ayumi's older sister. Meanwhile, the curse of Heavenly Host Elementary School slowly grows...

It happened after school one rainy day... A group of friends have stayed behind to prepare for the next day’s school festival. One moment they are idly telling ghost stories but the next an enormous earthquake strikes and the entire school seems to fall down around them. They awake to find themselves trapped in a parallel version of their school. As school abandoned and disheveled and whose calendar dates back to 1927. Can they find a way out of this nightmare or are they doomed to the same fate that befell the other victims whose corpses that lie numerous throughout the school? Note: Chapter counts contains an extra chapter and an origin chapter.