Brandy Shin, a book-loving teenager, finds herself halfway around the world from her home, sent by her parents to attend a private high school in a large city. Her small studio apartment, filled with her treasured books, becomes a sanctuary where she escapes into stories. One night, after over-reading past midnight, she is jolted awake by a system message from an AI named Steve, announcing the transformation of her world. Mana seeds, scattered five years ago, have converted Earth into a magical realm to combat a cosmic virus. Brandy learns that she is one of the few who survived the initial transformation, aided by a personal AI named Tara, who manifests in her stuffed rabbit. As Brandy navigates this new reality, she discovers that her beloved books have become spell books, each bound to her with powerful magic. She receives special powers and achievements, including 'Split Mind' and 'Bookworm,' which enhance her abilities to multitask and read at incredible speeds. However, the price of her new abilities comes with the loss of her family, leaving her the sole survivor of her lineage. Determined to survive and grow stronger, Brandy explores a dungeon in her building's basement, encountering monsters and gaining practical experience in combat. Her journey is one of self-discovery and empowerment, driven by the memory of her family and the need to protect her world from the looming threat of the cosmic virus. With the guidance of Tara, Brandy embraces her new identity as a mage, ready to face the challenges ahead and become the hero her world needs.