The carefree journeys of the four girls continue! As their fleeting yet eventful summer becomes a distant memory, the arrival of fall signals a new school year with limitless opportunities. Even as the four girls return to their peaceful routine, the appearance of new faces enlivens the anything but exciting rural life of Asahigaoka. Non Non Biyori Nonstop leisurely walks back into the lives of Hotaru Ichijou, Komari Koshigaya, Natsumi Koshigaya, and Renge Miyauchi as they fully embrace their rural lifestyles and turn anything they find into nothing but fun!

Beginning her academic journey as a first grader, Shiori comes face to face with the aspect of school she has heard alarming rumors about—homework! However, her worries quickly turn into excitement as the Asahigaoka girls agree to work together to complete their assignments at Komari and Natsumi Koshigaya's house. Their plan appears to be successful until an all-too-familiar feeling of procrastination creates a rowdy distraction for Natsumi. On another day, Natsumi asks her teacher Kazuho Miyauchi if she can form and lead a new badminton school club. While the lack of funding and equipment proves to be a major setback, it does not stop Natsumi and the other girls from asking the candy store owner Kaede Kagayama for some help. During their spontaneous badminton practice, a minor accident leads Kaede to reminisce about a memorable day when she babysat Renge Miyauchi.

After their parents' deaths, brother and sister Akito and Akiko Himenokouji were forced to live with separate families for six years. But now they have finally reunited and begin to live together. It quickly becomes apparent that Akiko harbors romantic feelings for her brother; however, Akito only sees her as a sibling. When three more girls—Anastasia Nasuhara, Arashi Nikaidou, and Ginbei Haruomi Sawatari—move into their apartment, Akiko's hopes of living alone with her brother vanish. Moreover, these girls also like Akito in one way or another, making it even more difficult for Akiko to gain her brother's undivided attention. As the girls fight over who should take care of Akito, they display various eroticisms that may be a little too much for a normal man to handle.

Short specials included in the Onii-chan Dakedo Ai sae Areba Kankeinai yo ne Blu-rays and DVDs.