23 parts Complete (Seirune Series #1) Ayla lives in a world where humans each has an Ellerwyn, a fairy-like creature, who exists to help people (who Ellerwyns call as their Seirunes) find their other half of the same type. They then disappear back to their families after completing their mission. Ayla's been through a lot, and Levira, her Library Ellerwyn, has always stayed with her no matter the circumstances. Because of this, Ayla treasures their friendship more than anything, which then makes her have a selfish thought: she decides never to fall in love. What makes it even more likely to have her wish achieved is that Library Seirunes are rare -- it's almost impossible to find Ayla's other half this way. But what happens if she suddenly finds one?