In April of the 7th year of Eiroku, the lord Shimadera Tomeiyasu decided to bulldoze Mount Marukami to build a city for the army to station. However, Minamimaru Tadayori disobeyed the order and was beheaded. Marukami Shoyori gathered the villagers and used super powers to destroy Shimadera Tomeiyasu.

2023 5On the same month, Nanmaru Yoji was demonstrating his piercing ability to the club members. He found that Professor Marugami Masami came to the Marugami seminar looking for his note. The lecturer Emi Sayuri said that the ancestors of Nanmaru and Professor Marugami were the same person.Professor Kami believes that the historical record of Marugami Masarai's betrayal of Shimadera Tsuyasu is not consistent with the facts. He went to Marugami Village to investigate but disappeared because of it. Emi asked Nanmaru to help find Professor Marugami.At this time, Toshio Kuraishi, the president of Marukawa Town Construction Company, was killed by someone with superpowers.