Martial Arts for All People Starts with Yearning

A handsome but unpromising college graduate is bound by the martial arts system to travel to a parallel world. This world is 99% similar to the original world. The protagonist travels to a parallel world on a hillside not far from the mushroom house that he longs for. Let's see what kind of trouble the protagonist can make with the people in the mushroom house. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.