Two brothers must take the helm of their family's company, Armadillo, Inc., after their father steps down from his position as the company's director. Through trials and tribulations, the two slowly begin to learn the true meaning of family.

The movie revolves around Mitsuba, who studies traditional art of rakugo. Rakugo is a form of comical story telling, sometimes referred to as sit-down comedy. Even though Mitsuba is mediocre at best, he ends up teaching three students.

"Daijobu 3 Kumi" depicts the interactions between new teacher Shinnosuke Akao, who was born without arms and legs, and the 28 students in his 5th grade class, told from the vantage point of school board member Yusaku Shiraishi

The story is about a family of three sisters and one brother with a dog living and running a Japanese Ryokan in Tenjin-cho, Hiroshima near Hiroshima Prefectural Industrial Promotion Hall.