"No one knows the reason behind the cold sweat dripping from his face."
An utterly ordinary middle school, during an utterly ordinary class. It’s the fourth period just before lunch break, and almost none of the students have any focus left. Yet among them, one boy stands out as especially absent-minded: Nobuo Ōyama. He’s suffering from a brutal stomachache, desperately holding back something that absolutely must not come out here and now.
An utterly ordinary middle school, during an utterly ordinary class. It’s the fourth period just before lunch break, and almost none of the students have any focus left. Yet among them, one boy stands out as especially absent-minded: Nobuo Ōyama. He’s suffering from a brutal stomachache, desperately holding back something that absolutely must not come out here and now.
After a chain of deaths at a junior high school, new transfer student Koichi Sakakibara turns to a mysterious girl who holds the key to the dark mystery.
Erika Shinohara is a first year of high school student. While talking to friends, she makes up a story about her "boyfriend." In reality, Erika Shinohara doesn't have a boyfriend. Erika's friends soon begin to doubt her story and Erika is also running out of lies. Erika then sees a pretty boy on the street and takes his picture discreetly. She later shows his picture to her friends as her boyfriend. The boy in the picture is Kyouya Sata and happens to attend the same school as Erika. She tells Kyouya about her situation and asks him to be her pretend boyfriend. Even though Kyouya has a pretty appearance, he has a dark side.
With only a year left to live, 17-year-old Akito finds new meaning in life by bringing joy to a terminally ill girl who has just six months remaining.
Ninako Kinoshita has never been in love until an encounter with the school's most popular boy, Ren Ichinose, leads the two to befriending each other. Ren's patient and kind personality is a far cry from his unapproachable idol status at school, and soon Ninako falls in love with him. However, she must cope with the fact that he already has a long-time girlfriend.
The story follows Nozaki Haruka, a middle school student who transfers to a new school in a small town because of her father's work. Unfortunately, she becomes a victim of horrific bullying, but since the school will be closing in 2 months after graduation, no one is willing to help her.
Giko Nokomura is a female student at Nightingale Academy, who carries around her very own chainsaw. One day she begins to be attacked by modified corpses created by one of her classmates, Nero Aoi . She tears her way through the corpses and busts into Nero's hideout. Why is Nero so intent on attacking Giko?! The reason will shock you!After her battle with Nero, she encounters a new enemy. It's the leader of the Nightingale Academy Student Council Guardians, Nemesis.
Soyo, a student in a school with only six students, develops feelings for the new student, Hiromi, who has moved from Tokyo.
A girl mysteriously receives advice from her future self and as a result her group of friends, along with a newly arrived, troubled classmate, learn how to be better friends and a better community.
After an outburst at school involving her son, a concerned single mother demands answers, triggering a sequence of deepening suspicion and turmoil.
Two 14-year-olds from troubled, abusive homes come together sharing misery and pain. In the aftermath of an earthquake, the classmates learn how to survive while relying on one another for emotional and physical support.