Survival/Death Game

One day, Matsui Sakura receives an invitation to a "Revenge Game," and decides to attend. At the location indicated, she ends up locked in a dorm-like building with four of her classmates. It appears that the Revenge Game is being run by a wealthy classmate, Saionji, who was bullied so badly by some of the students that it ruined his life. Now he is taking his revenge, in a brutal game that allows him to have one of his former tormentors killed each morning.

Naraka High School, is a seemingly normal school. However, unknown to the public is the cruel truth of what really goes on in the school's halls. Rather than studying, students are forced to struggle for their very survival. And the strong bonds of friendship may be the only difference between life and death.

Everyone’s dormant lifestyle seems to awaken when they are asked to vote for a classmate who will be asked to clear a task or otherwise become the “sacrifice” and suffer a “social death”! These high schoolers have some intense secrets that can’t come out.

The main character has a boring life until a box with a VR headset appears on his doorstep. He must play a virtual game of life or death.

The manga seems unfinished, so the ending is quite unsatisfying. The last page said end of part one, so there has to be another part. Maybe the mangaka was being too optimistic and next part was never made...?

No one knows about it. It must never known. For it is the Bookmark of Demise. If the empty book and and cat bookmark are found, one will become involved in the game intertwined with death. The Demise Game.

Five friends are kidnapped, and wake up in a strange room with a character from a short-lived anime. Apparently, one of them has entered them into a "friendship game" in order to take care of their massive debt. But who was it, and why did they have such a debt?

To search for a missing friend, 6 people arrived in a closed theme park."Birdcage Castle" which should be deserted...However, in there, groups of two people are created and are connected by a chain, and now, the game of putting one's life on a line began!

Ten contestants agree to put their life on the line to have a chance of winning 100 million yen. To win, they must survive 10 days inside the prison of their minds.