Having published his debut novel in the middle school, Ichiya Chitani is facing caustic criticism on the internet and dwindling sales in high school. His confidence as a writer is at rock bottom. Meanwhile, the sadistic Shiina Koyurugi is a popular writer of the same age. One day, the two utterly different writers are ordered by the chief editor to cowrite a bestselling and critically acclaimed novel. During their hectic cowriting process, Ichiya finds out about Shiina’s unspeakable secret.