Desiderium

Approaching the end of her twenties, Yu Bumi is abandoned by her fiancé for the simple reason that she's "boring." One day, while unexpectedly trapped inside a storage room, she discovers a wish-granting wand and enters into a contract with a fairy named Nemesis. However, Bumi keeps making one trivial wish after another, rapidly draining Nemesis's magical power. With his magic nearly exhausted, Nemesis has no choice but to begin replenishing it manually... "My ugly little human. Stay by my side and desire anything your heart wishes."