Kohinata-san Chi no Chounan wa Fukigen小日向さんちの長男は不機嫌; The eldest son of the Kohinata family is in a bad mood.

The handsome “mom“ Kano comes to the the house of Kohinata, a family of 6, all men. The oldest son, Kaname, could not accept Kano due to something that happened in the past. What will happen next?