In Fujisawa, Sakuta Azusagawa is in his second year of high school. Blissful days with his girlfriend and upperclassman, Mai Sakurajima, are interrupted by the appearance of his first crush,…

The Noharas get abducted by aliens who claim that Shin-chan’s baby sister is their princess! Will she stay on this planet or return to Kasukabe?

After a draining December, Sakuta is quickly nearing the end of his second year of high school. Since Mai is a third-year student, they don’t have much time left together…

Finally, the day of Mai’s high school graduation has arrived. While Sakuta eagerly waits for his girlfriend, an elementary schooler who looks exactly like her appears before him. Suspicious, and…