In the year L.C. 922, humanity confronts an unprecedented crisis. After the end of a century-long war on the mythical world of Tetraheaven, the defeated Majins sought refuge and invaded the human world of Septpia. The government is compelled to fight by employing Logicalists from ALCA, a special police force that protects the streets from foreigners of another world. Logicalists are granted a special power that allows them to enter a trance with Goddesses from the other world. The future of the world depends on "Luck" and "Logic," as well as these Logicalists.