Developing Muscles by Accident in the Saberya World

One day Yujiro was walking in the wilderness Suddenly, the mountains and the ground shook in front, and a mechanical palm holding a 10-meter-long Odachi passed across the sky. "Boom boom boom!" "Bang!" A huge thing landed in front of him. "Yujiro, I'm here to challenge you!" A 10-meter-long, 1-meter-wide sword was pointed directly at Yujiro. The 15-meter-tall mechanical giant made a huge sound that echoed in the forest. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.