My Wife is a High School Girl

My Wife is a High School Girl (おくさまは女子高生, Oku-sama wa Joshi Kōsei) is a Japanese manga series written and illustrated by Hiyoko Kobayashi. The series first began as a manga serialized in Young Jump published by Shueisha. A video game based on the series was released for the PlayStation 2 and the Dreamcast. An anime adaptation aired in Japan between July 3 and September 25, 2005, containing 13 episodes, with each episode composed of two mini-episodes.

Plot
Asami Onohara is a seventeen-year-old high-school student with a secret which has not been revealed to anyone: she is already married. Her husband, Kyosuke Ichimaru is a physics teacher in the same high school as her. However, even though they are officially a married couple, Asami's father forbids them to have any sexual contact until after Asami has graduated. Asami has to hide the fact that she is married to Kyosuke while trying desperately to further their relationship, and it does not help when there are so many interferences and obstacles from her father and other third parties.