Description:

A high school class, containing 32 students, all receive a strange text message on their cell phones one night. It welcomes them to the "Ousama Game," in which they are given specific tasks to carry out in a 24 hour period. No one takes it very seriously at first, as the tasks are trivial things like having one student kiss another. Soon, the tasks escalate beyond what the kids are willing to do, and they learn that the cost of failure is death. Will they be able to find a way out of the Ousama Game before more people die, and the living lose their integrity and humanity through their participation in the increasingly horrible daily tasks? (Source: MangaHelpers)

Description:

Three years have passed since the bombing of a classroom by a boy who rarely came to school. Now, the seven survivors of that incident have gathered in that classroom. One of the survivors, Takumi Shindou, informed the other survivors that one of them was responsible for giving the bomb to the culprit. With those words, the search for the accomplice began. At the same time, a female student went to a private high school in Tokyo. "All of you will die with me," she said, with a bomb wrapped tightly around her body... Thus continued a chain of terrorism by bullied students, striking fear into classrooms all across the nation! (Source: Mangadex)

Description:

Neku Sakuraba, a 15 year-old boy with a hobby for music and graffiti, wakes up in what seems to be the Shibuya shopping district of Tokyo, Japan. With no idea why he's there, he opens his hand to realize he is holding a strange black pin. After flipping it with his hand, the thoughts of the people surrounding him began to flow into his head at once. Surprised, Neku discovers he is able to read the minds of others, and assumes it has something to do with the black pin he is holding. A cellphone starts to ring in his pocket, and he can't tell whether it is his or not. A text message appears: "Reach 104. You have 60 minutes. Fail, and face erasure. -The Reapers". After discovering he can't delete the message, a timer of 60 minutes imprints onto his right hand. Neku is in Shibuya to play the "Reapers' Game", which spans a total of 7 days. All Players of the Reapers' Game have a black pin with a skull embedded on it. (Source: Wikipedia)

Description:

At Ogasaka High School, students in class 1-A can get involved in an unreasonable game called "Friendly Play." In which one of the conditions of the game eat the bodies of their friends to survive. Cannibal school begins. (Source: MU)

Description:

There's a game going around Japan called 'Rabbit Doubt'. The premise of the game is that all of the players are rabbits in a colony, and one amongst them is randomly chosen to be a wolf that infiltrated the group of rabbits. Every round, the wolf kills off a rabbit, and every round, the group tries to figure out which of the rabbits is actually a wolf in disguise. Sometimes the kids who play this game decide to meet up in person, and Yuu, Mitsuki, Rei, Hajime, Eiji, and Haruka have done just that. Unfortunately, one of them has decided to take on the mantle of the wolf and has already killed once. Who is the wolf, and can they be stopped before everyone meets a very unpleasant end? (Source: MU) Note: Chapter count includes a special chapter.