Beautiful, funny, intelligent. Basically perfection in every way. That's Gryffindor Prefect Solar. You either want to be with her or be her. Starting her fifth year at Hogwarts, Solar begins to feel the burden of the title she's been unintentionally given. All the professors and students look towards her as a great example and role model but what happens when her image starts to falter and her desires start to grow for something more or...someone else.

Typical love story of two people who shouldn't be together. They couldn't be any more different and there's endless reasons on why they would be better apart. The sun and the moon are polar opposites in the same sky. However, Byulyi wants to do nothing but protect both night and day. And this is what she does. Because Yongsun is her everything.