Nijou Hanabi (girl) and Natori Idzumi (boy) are headed for their first
day of middle school. Hanabi and Idzumi have spent most of their lives
together; their parents were neighbors and close friends, they've
learned kendo together, they've always been in the same classes at
school and were even seated near one another. When their homeroom
teacher tells them that middle school will be different from elementary
school, Hanabi can't really see it at first. She's seated next to
Idzumi, as always, and they are still as close as ever. The two of them
begin to meet new friends and acquaintances, and they, along with their
new friend Homare, join the kendo club. However, Homare and Hanabi are
the first and only females in the club, so they get a bit more attention
than they would have expected. From their first club meeting, Hanabi's
life begins to be more complicated, as barely understood jealousies
begin creeping into her relationship with Idzumi. It seems that becoming
a teenager is going to be very different than being a child!