"One day, a girl who loves me will stand before me," Nobunaga, a middle school teacher, has long fantasized about such a gal game-like event. However, the one who appeared in front of him was Kichou, a 14-year-old girl who claimed to be his wife. Appears to have arrived from the Sengoku era, she mistakes Nobunaga as Nobunaga Oda and urges him to conceive a child with her. Thus starts the age-difference love comedy between a female instructor who enjoys video games and a Sengoku period expert princess.