Story takes place in the same universe the the previous two novel adaptations.
A group of junior high school students are trapped in the western mansion known as "Jail House," rumored to be haunted by a blue humanoid monster. Splitting up to search for exits to escape the mansion, the students are now being stalked by the pursuing blue monster, going after their lives.
Behind the scenes of the “Hero” and “Devil” that everyone knows well, there was a swirl of strategies to maintain a balanced power relationship with each other! 500 years since the last battle of "Hero" vs. "Devil," the Helenes Kingdom, faced with population growth and food shortages, decided to cultivate territory in the buffer zone “ambiguous navel.” As a result, the balance that has been maintained begins to collapse.
An anthology comic of Tensei Kizoku no Isekai Boukenroku: Jichou wo Shiranai Kamigami no Shito by various mangaka.
*Note: Includes one extra chapter.*
The series sees mathematician Gakuto Mikoshiba, from Kaminaga's other series Kakuritsu Sōsa-ka (Probability Investigator), battle wits with Yakumo Saito from the Psychic Detective Yakumo series. (Source: Anime News Network)
Driven by a prophecy, the strongest and most beautiful girl, “Thunder Empress Nanaki,” decides to leave the empire... and in her new home, she changes careers to become a maid—her true calling (?)!! Featuring a smug grin and a peace sign—so cute!—this masterpiece of fantasy is packed with lightning-fast action and addictive comedy, depicting the daily life of Nanaki as she unleashes her ultimate power to the fullest for her master. (Source: Earth Star Entertainment, translated) *Note: Includes two extra chapters.*

