Public Summary Y/N and Yuki Akimoto have been rivals since elementary school—what starts as childish conflict slowly escalates into years of escalating violence, competition, and obsession that follows them into high school. Both boys are high-achieving students in their own right: Y/N excels academically and in leadership roles, while Yuki is a nationally recognized volleyball star and school figurehead. Because of their value to the school, repeated fights between them are consistently overlooked or lightly punished, despite increasing severity over time. By junior year, their rivalry has become infamous throughout the school. Physical altercations, verbal attacks, and constant tension disrupt daily life for students and staff alike, forcing the administration to finally intervene with mandatory therapy sessions. What begins as a simple childhood grudge evolves into something far more complex—an intense, years-long fixation neither of them fully understands, where hatred, competition, and emotional dependence become increasingly difficult to separate.