Todomatsu starts to work at a stylish cafe. His brothers try to disturb his fulfilling life. / Dekapan and Dayon enjoy a carefree travel together toward north.

Iyami and Chibita dress up as girls, and trick the Matsuno brothers into falling in love with them. It's only a matter of time before this plan goes bad.

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.