As an overweight child, Makabe Masamune was mercilessly teased and bullied by one particular girl, Adagaki Aki. Determined to one day exact his revenge upon her, Makabe begins a rigorous regimen of self-improvement and personal transformation.Years later, Masamune reemerges as a new man. Handsome, popular, athletic, and with perfect grades, Masamune-kun transfers to Aki's school and is unrecognisable to her. Now, Masamune-kun is ready to confront the girl who bullied him so many years ago and humiliate her at last. Revenge is sweet!