During their school days, Hayato and Dave were the star pair of their tennis club's doubles team. Now in their mid 20s, they have both spectacularly degraded into a bag of bones and a tub of lard. This led them to becoming the laughing stock at their recent class reunion.

This is a muscle-pumped comedy following the skinny and fat pair as they train back their slackened heart and body with the help of Sekiguchi, their personal trainer! This story is unlike any other workout manga as it's based on the author's personal experience as a trainer. Now, let's aim for that muscular body!!