Iwaki Tomonori is a 15-year-old student who likes older women. Having just discovered that his teacher (upon whom he has nursed a massive crush) is engaged to be married, he comes home to find, much to his dismay, that he has been forced by "national power" to marry a 12-year-old girl named Rizel, who is the government's first creation in its experiments to genetically engineer a human. Whatever resistance Iwaki's parents might put forth is immediately dissolved by promises of free HVAC, promotion, and government paid home loans (all instituted by "national power," of course). Despite Iwaki's protests, Rizel and her three secret service guardians known only as Papa A, Papa B, and Papa C move briskly into Tomonori's house, and the stage is set.