The AI-controlled, robotic vacuum cleaner “Almighty-kun” is versatile, hard to obtain and so efficient that rumors about a possible hidden conspiracy about Almighty-kun have popped up on “Bump in the Night”. One day, Tate and the others go on a social studies field trip to the NGEI, which also provides the technology for Almighty-kun’s development, but Misaki gets engrossed in the exhibition, and wanders through the halls alone, towards the director’s office, where she overhears something unbelievable. At the same time, all of the Almighty-kun in town gather outside, and a great rampage begins.