One day, Kinu, who works as a maid, suddenly finds herself married off to a famous "eccentric" linguist, Mayuri Matomi, who is older than she is.

Kinu, who feels inferior because she has no home to return to and is a "returnee," is unsure if she can make it as a married couple with someone she doesn't even know,

What will happen when Kinu and Iyeri begin their awkward married life together?

This is a pure love story for adults that depicts how two clumsy couples slowly develop their love and become irreplaceable.