Asami Onohara, a seventeen-year-old high-school student, has a secret that no one knows about: she is already married. Her spouse, Kyosuke Ichimaru, teaches Physics at the same high school as she does. Despite the fact that they are legally married, Asami's father bans them from having any sexual contact until Asami graduates. Asami must conceal the fact that she is married to Kyosuke while urgently attempting to further their relationship, which is difficult given the numerous interferences and difficulties from her father and other third parties.