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.

The prehistoric sextuplets fool with nature for the last time. Several thousand years later, in a parody of Romance of the Three Kingdoms, Emperor Osomatsu and a group of bizarre generals attempt to take over the country. Meanwhile, in the real world, Osomatsu joins Todomatsu at a mixer, struggling to keep his perverted instincts in check.

A series of end-of-year skits. Osomatsu and Choromatsu try to do one thing that could make them say they had a good year. Ichimatsu gets persuaded to take part in a lottery, Dekapan and Dayon pound mochi together, Hatobou gets pestered by some greedy Jizou statues, and Choromatsu sends some untruthful New Years' cards. During the second half, a news crew documents Todomatsu, who was let go from the Matsuno family the previous year and is forced to try out for a reserve team.