A former corporate drone in his 40s charges through another world with a super physical-specialized style! Okuno Soshi, a former office worker in his 40s who was ground down by corporate life, is forced to work as an adventurer in another world. The chronic shoulder stiffness he accumulated over years of being a corporate slave disappears, and riding that wave of exhilaration, he just keeps swinging his weapon, training relentlessly, building up his skills, and heading into dungeons… He quickly settles into his new isekai life. But his growth curve has one peculiar trait: "it's nothing but physical-specialized skills"――!?!?