Magical Girl Lyrical Nanoha A's

Nanoha, an ordinary third-grade elementary school girl, encountered Yuuno from another world by chance and thus acquired the power of magic. During battles surrounding a mysterious legacy from another world, she became close friends with Yuuno, who had guided her to gain magical abilities. She also met people from the Time-Space Administration Bureau who supported her in battle, and forged a deep friendship with Fate, a girl from another world, through their past conflicts. Half a year has passed since the end of those battles. Nanoha continues to practice magic amidst her peaceful daily life while looking forward to reuniting with her friends. Suddenly one day, she is attacked by a mysterious figure. With the help of Fate, who appears shortly after, the two finally repel the enemy, but Nanoha's magical power is stolen. It turns out that a group plotting to complete the forbidden grimoire, the 'Book of Darkness,' is collecting magical energy. The two then meet Hayate Yagami, a girl who holds the key to destiny. Together, the three girls bravely face the struggle against fate...