Nariyuki Yuiga has dedicated his life to becoming a useful man. In order to give his family a better life, Nariyuki decides to work hard in school and get a special scholarship that covers all of his university fees. Nariyuki gets the perfect opportunity to earn the scholarship, but there is a catch. Nariyuki must tutor two of his smartest classmates Fumino Furuhashi and Rizu Ogata, who are both talented in certain subjects but have terrible grades in others. With multiple tutors failing before him, Nariyuki must learn how to teach the girls if he ever hopes to get his scholarship.

Oda Nobunaga is a middle school teacher who longs for a romantic relationship. One day, while visiting his parents, a girl appears out of thin air after Nobunaga accidentally breaks a teacup. The girl reveals that her name is Kichou and that she has come from the Sengoku era to be Nobunaga's bride. Things get even crazier when more girls begin to show up, with all of them not only have a connection to the Sengoku Era, but also have feelings for Nobunaga. With all of these girls at his side, Nobunaga learns that having the harem he always dreamed of won't be as easy as he thought it would be.