Legend says that centuries ago, a colossal spider ravaged Tokyo. Resistance was futile, as none could quell the havoc wrought upon the city by the beast. Fortunately, one man—the legendary exorcist—stopped the devastation. Using his divine powers, he sealed the monster away and the world has enjoyed peace ever since. Mizuki Henmi is an adolescent girl who is acquainted with Shu Suzuri, a dull young man who runs an old Japanese bookstore. During a routine visit to his store, Mizuki learns of a mysterious and valuable book that Shu is planning to sell. Unfortunately, the unrestrained Mizuki handles the book roughly, breaking the seal that kept it shut and revealing an odd entity—a cute spider. Wasurenagumo tells the story of Mizuki, Shu, and their seemingly harmless spider. However, ominous winds begin blowing. While Shu is infatued with his arachnid friend, Mizuki becomes wary of its every move…

A girl moves from the city and goes to school in the country due to some circumstances in her father's job. Her new schoolmates keep her at a distance. There is a boy she'd like to get to know better, but she worries about how he might treat her and doesn't try to get closer. She begins to hate life in the countryside and longs to return to the city, but she ends up meeting a real god of wind.

Following a series of attacks that have left teachers and students alike sapped of their magic, headmistress Liza Quillyn decides to seal off the College, rendering it impossible to enter or leave the premises. As a result, Philomela Sargant is unable to comply with her grandmother Lizbeth's order to withdraw from the school. Trapped inside the College, Chise Hatori and her classmates begin to adjust to their novel and stressful circumstances. But as time goes on, Philomela's condition only gets worse—both mentally and physically. Meanwhile, details about the tragic past of Chise's roommate, Lucy Webster, continue to resurface. As Chise grapples with worries about her friends and with her evolving self, the identity of the mysterious magic-draining culprit plaguing the College may finally come to light.

With her ability to read minds, Anya Forger is the only one who knows the true identities of her unconventional family. Her pretend father Loid operates as an elite spy code-named Twilight; her mother Yor kills on demand as the assassin Thorn Princess; and their dog, Bond, possesses the gift of precognition. Although they hide the truth from each other, this pretense of a perfectly ordinary family provides Anya with the genuine love and warmth that she longed for as an orphan. Operation Strix—Loid's special mission to avoid potential war by gathering vital information and getting close to the powerful political figure, Donovan Desmond—is only possible if Anya plays her part right. She can either excel academically and become an Imperial Scholar at her prestigious school or make friends with Donovan's son, Damian. Neither is exactly easy, but with her adventurous attitude, Anya throws herself wholeheartedly into her mission as a Forger—all for the sake of international peace.