"Someday—you will kill me." Amelia, the hidden head of the Ronan ducal house, was once betrayed by the first king she loved, Iris, and became immortal due to a curse known as the “Blessing of God.” This curse not only bound her life but also forced her to protect the kingdom for eternity—as long as Iris’s bloodline continued. Seven hundred years passed, and with Queen Isolde’s rebellion against the king, the long-standing royal bloodline was finally extinguished. However, Amelia’s curse did not break. Despairing, Amelia was suddenly summoned by an unfamiliar boy named Felix. Only the first king, Iris, should have been able to summon her with magic. Realizing that this boy might be the only one capable of breaking her curse—the true “Blessed Child”—Amelia makes a decision. To be released from this world—to be “killed”—she resolves to raise Felix into someone strong enough to do it… but what awaits them?