Kurando Tamaki is a dull, middle-aged salaryman, treated as unreliable by everyone around him. Mocked for his potbelly, ignored coldly by his daughter at home, and to top it off, he glimpses suspicious call logs between his wife and a male coworker on her phone... In the midst of these miserable days, his capable junior colleague, Mizuki Ayase, invites him to the equipment room. While helping carry some gear, he accidentally touches her chest—and that exact moment is caught on video! After work, she's waiting for him—with the video in hand—and drags him off to an unexpected location... a gym!? Sexual harassment comes at a price—body transformation!? A secret-from-the-wife fitness comedy begins!