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...

The heroes are shocked by Ishinoo's death. The badges worn by Ido and Levi, depicting a "broken dragon's face," belong to a mysterious organization called "Half-Dragon," which aims to instigate conflict between demon lords. Seeking clues about the mastermind behind Ishinoo's murder, Yashiro heads to the Ministry of Education, Culture, Sports, Science and Technology's Demon Lord Disaster Countermeasures Branch Office and learns that a large bounty has been placed on the son of a certain politician. That son is a subordinate of Lord "Two-Handed Wedge," whom they fought a few months ago...