Kimi ni Tarinai no wa Kinniku da!

Synopsis

Hayato and Dave were once a formidable doubles team in their high school tennis club. However, by their mid-twenties, they have fallen out of shape, with Hayato becoming scrawny and Dave gaining weight. Their physical decline makes them the subject of ridicule at a class reunion. Determined to reclaim their former fitness, they enlist the help of Sekiguchi, a personal trainer, embarking on a journey to rebuild their bodies and spirits.