What kind of title is this?: Manga.
How many volumes are there?: 10 volumes are listed.
How many chapters are there?: 54 chapters are listed.
Where can I read it?: Reading links are listed for Pixiv Comic, Seven Seas Entertainment. Check availability in your region.

Synopsis

About Masamune-kun’s Revenge

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, with perfect grades and good at sports, Masamune-kun transfers to Aki’s school, and is unrecognizable to her. Now, Masamune-kun is ready to confront the girl who bullied him so many years ago and humiliate her at last. But will revenge be as sweet as he thought? (Source: Seven Seas Entertainment) Included Side Chapters: Chapter 9.5: Investigative Report into Aki Adagaki Chapter 12.5: A Fine Tradition of Stewardship Chapter 14.5: Tsunade Island Incident Part 2 Chapter 20.5: Kojuurou Wants To Become A Dandy Chapter 35.2: Piggy's Memorial Part 2

Comedy Romance