Are high-school girls Nanoha and Chidori ready to face the storms in their new romantic relationship together?

Nanoha and Chidori are best friends who attend the same all-girls high school—and also share a heart-pounding secret: they’re lovers. Through sunny days and tumultuous storms, they’re always ready for new adventures together.

The school year winds to a close, and both Chidori and Nanoha have decided on their post–high school plans. During summer break, as they chat in the empty Literature Club room, a new development opens up a different path in their futures, which sparks a trip down memory lane—back to the first time they met.