Okusama wa Shougakusei奥サマは小学生 ; My Wife Is an Elementary Student ; Oku-sama wa Shōgakusei ; 我的老婆是小学生

The story is set in the near future when the marriageable age was lowered in response to the declining birth rate. A 24-year-old man marries a 12-year-old girl in this gag comedy.