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. With the last year of high school in full swing, Chidori and Nanoha do their best to adjust to being in separate classes. Despite the time apart as well as the possibility of a long-distance relationship after graduation, the pair keep finding ways to grow closer. As Chidori's birthday draws near, Nanoha lays out a thorough plan to make it the best day ever!