Shikimori and Izumi are high school sweethearts. They hold hands walking home from school, they flirt in the halls, they tease each other. Shikimori seems like the perfect girlfriend: cute, fun to be around, sweet when she wants to be… but she has a cool dark side that comes out under the right circumstances. But Shikimori knows what she wants, and how to get it, and she can turn from cutie to cool in an instant.