Matenro's great magic - S1.E13

Today, Satoru is on duty to take care of the weapons of the Hadogumi. I had just witnessed Mr. Ochiai making a phone call somewhere, so out of a sense of mischief, I turned my "shoe-on-ser" on and could hear what Ochiai was saying. The teacher is Matenro after all!? Satoru chases after the teacher in order to get definitive proof, but not only does he lose sight of him, but he also breaks the shoe-on-ser...