Natori Hana is an earnest, good-natured 25-year-old woman whose cousin refuses to go to high school. Hana takes her cousinΓÇÖs place and attends the high school. On her first day, though, HanaΓÇÖs ruse is discovered by her former high school classmate Kanie Akito ΓÇô who happens to be the high schoolΓÇÖs world history teacher.