Masamune-kun's Revenge

As a child, Masamune Makabe was cruelly turned away by the wealthy and admired Aki Adagaki, who mocked his weight and saddled him with the nickname “Piggy.” Humiliated, he remade himself through relentless training, growing into a handsome—and decidedly self-absorbed—high schooler with a single goal: make Aki fall for him, then reject her in return.

Fate places him right back in her orbit when he transfers to Aki’s school. Masamune tries to get close to the so-called “Brutal Princess,” but his early efforts go embarrassingly off track. Just as his revenge finally starts to gain momentum, a mysterious letter arrives addressed to “Piggy,” threatening to unravel everything unless he can uncover who’s behind it.