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.

After resolving the big fight during the Nagasaki field trip, Nanoha and Chidori return home, their relationship stronger than ever. Then, Mai, the underclassman with secrets of her own, accidentally reveals her crush on Nanoha—to none other than Chidori!