The Matsuno brothers struggle to find employment. Later, Osomatsu tries to take an interest in his brothers' lives but winds up being a nuisance to them.

A salaryman named Sanematsu takes care of his six siblings, the Matsuno brothers play the roles of a friend group of working girls, and Choromatsu gets caught during a private moment.

Wanting to become the main protagonist of the franchise again, Iyami holds a bizarre kart race to determine who the protagonist of Osomatsu-san will be.

Matsuzou becomes hospitalized, leading the brothers to seriously think about their lives and get proper jobs to support their family. A chance meeting with Totoko sets Osomatsu's mind straight...