It's funny that for a guy that was pretending to be a teacher, Yagyuda turned out to be a great one, it was pretty clever of him to use the whole job thing as an excuse to take Sanda's mind off the idea of getting revenge and actually do something for himself for once, the experience ended up helping both him and Tonakai to learn more about what they can do, and will be useful against the Special Investigations Unit even though they didn't even realize that.
Also I can't help but laugh that the company is called Ookami Yamato, because Paru couldn't help herself in putting a wolf somewhere.