At Ishinoo's request, Yashiro reluctantly agreed to guard Jogamine. Their plan was simply to infiltrate a club in Shinjuku's Kabukicho district, receive E3 from Matsugi the "peeping tom," ask "a certain question," and leave. However, they stumble upon men who have been given E3 trying to lure two girls in, and Jogamine's rampage begins once again!

A practical swordsmanship exam is scheduled at the academy attended by Jogamine, Indou, and Sera. For the three, this exam is a crucial event that will determine whether they advance to the next grade or are expelled. Yashiro begins special training in the academy building at night to train his self-proclaimed "disciples." While engaging in fierce battles, Yashiro accurately points out the three's weaknesses. However, they encounter an unexpected enemy there...