At the end of the first year of high school, Futaba Yoshioka meets Kou Tanaka who was her first love. In their middle school days, they attended the same school, but he suddenly transferred to another school. Three years later, he appears in front of her again with the different last name of Kou Mabuchi. His personality also seems to have changed from warm to cold. He is like a totally different person from three years ago. Futaba Yoshioka slowly learns what happened to Kou Mabuchi for the past three years and she become to have feelings for him again.

Wakaba saves her classmate Koki who was being bullied. From then on, people who are involved with Wakaba are killed one after another. When the murderer is found out, Wakaba realizes what true love is.

Higashiyama Haruto is a 34-year-old Japanese history teacher who combines good looks with an honest and friendly personality. When he has been assigned to Nitaka High School, a school for advanced students, Haruto immediately attracts the attention of his female students. But he has a secret that he cannot tell anyone; he wants to be killed by a beautiful high school girl. Obsessed with such a bizarre desire, Haruto approaches four beautiful girls of different types, Maho, Aoi, Kyoko, and Aika, according to the perfect crime scenario he has devised. Who among the four is the high school girl that Haruto has been longing to be killed by for nine years?

Set in a high school senior class where students can now marry without parental consent due to the implementation of the new "18-year-old adulthood" law, this unprecedented school suspense drama explores first love, pregnancy, marriage, and even infidelity. Not only are the students of Class 3-C involved in affairs, but so are their parents and teachers...!? The protagonist of this work is Uemura Aoi, who transfers into Class 3-C at an elite high school after her parents get divorced due to her father's affair. The story depicts how she reunites with Tachibana Iori, a male student who was her first love and is now married to another classmate, and how they fall into an illicit affair. Their romance eventually spirals into a scandal that engulfs the school and their parents, leading to a gruesome tragedy.