In this thrilling sequel series to Mechanical Buddy Universe, humans and machines unite to protect their chosen families! Introducing Nikuzuki, a teenage ninja who wields high-tech wires in battle! After she becomes fast friends with Rainy and they go on a treasure hunt together, their mettle as mercenaries is put to the test. A deadly enemy known as a Drone Dominator has resurfaced, dredging up bad memories for Blau!