Shinta Hashijima was enjoying a fun, peaceful school life—until the arrival of Rikiya Gouhara, a massive and violent transfer student who turned his world upside down. When Shinta dared to speak out against Rikiya's tyrannical behavior, he became an instant target. Rikiya picked fights over the pettiest excuses, subjecting Shinta to relentless bullying. Demoted to the lowest-ranking lackey in the group, Shinta fell into a miserable daily grind where even his once-close friends bossed him around like an errand boy. As the humiliation mounted, thoughts of getting revenge on Rikiya consumed his mind.

Then one day, Shinta catches Rikiya cowering and shrinking back while being chewed out by a gorgeous, unfamiliar woman. Upon realizing this striking beauty is none other than Rikiya's own mother, Shinta makes his decision—locking onto Yaeko Gouhara as the ultimate target of his revenge...