Ephinia is an elven princess who has just been granted an audience with the dragon clan emperor and the moment the two met, they discovered that she is the emperor's fated mate. She was shocked by this but when she heard the emperor's heartless words, saying, "It's regrettable that someone so childlike is my mate"...

Fine then! I don't desire your passionate love!

Ephinia later became close with a small dragon and is now fully enjoying her life in the emperor's harem however, it seems that there's a secret to this particular dragon...
成人の年を迎え、竜族の皇帝に謁見することになった妖精族の王女エフィニア。
しかし皇帝グレンディルに出会った途端、なんとエフィニアが彼の「運命の番」だということが発覚する。
驚くエフィニアだったが「あんな子供みたいなのが番だとは心外だ」という皇帝の心無い言葉を偶然聞いてしまい…。
ならば結構です！傲慢な皇帝の溺愛なんて望みません！
他の側室の嫌がらせにもめげず、エフィニアはのびのびと後宮ライフを満喫。
やがて後宮に迷い込んだ小さな竜とも仲良くなるが、どうもこの竜には秘密があるようで……。