Reiketsu Ryuuou Heika no "Unmei no Tsugai" rashii Desu ga, Koukyuu ni Hikikomorou to Omoimasu

Synopsis:

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...Pixiv ComicOriginal Webnovel