Kyousuke Ichimaru (voiced by Mitsuaki Shindono) is a young man with a very simple appearance and heart. He is currently working as a physics teacher in a high school. Although he is a little dull and shy, and lives a boring life every day, Kyousuke is surprisingly popular among teachers and students. In fact, Kyousuke has a big secret. Not only is he married, but the person he married is actually a high school girl named Onohara Asami (voiced by Ayako Kawasumi) who attends the same school! 17-year-old Asami and Kyousuke have a very good relationship. At school, she is his student, and when she returns home, she is his wife. In order to follow their father's wishes, Asami and Kyousuke must strictly keep their secrets in front of their classmates. However, there is no impenetrable wall in the world, and some people still notice the unusual relationship between the two. What will happen to their fate and love? Can Kyousuke wait safely for Asami's graduation season?