"Ah, no need, Usui-kun wants to promise me something in return..." Yuzi said shyly.
Usui Bing: ".... When did I say that?"
Yuzi: "But since you have to agree with me, it's not impossible."
Ui Bing: "... You have a beautiful idea."
Grapefruit "...."
In short, this is a story about a strange heroine with a broken moral character, a pure lolita appearance, and a sinister heart. She pursues the almighty prince Usui Takumi. Well, the story.