Mr. and Mrs. Osanai Couple Want to XXX

After 10 years of chaste dating, Mr. and Mrs. Koyamauchi finally celebrated their wedding night together, but what was the strange thing that happened to them...? A romantic comedy about a couple whose love is put to the test, between a stubborn elementary school teacher husband and his wife who is much too cute (in a troubling way). (Source: ComicWalker, translated)