At seventeen years old, Asami Onohara is a high-school student harboring a secret that nobody knows: She's already wed. Her husband, Kyosuke Ichimaru, teaches Physic in the same high-school. Nonetheless, despite being officially married, Asami's father forbids them from engaging in any sexual activity until she graduates. Asami must keep her marriage to Kyosuke a clandestine affair while striving to progress their relationship amidst the hindrances and obstacles raised by her father and other third parties.