Dumped by My Fox Mate, Claimed by Twin Serpent Kings

During a mission, Class-A mage Selena was in great danger. Lucien the white fox abandoned her and used magic to protect his elder sister Vivian. Selena then terminated the contract and chose the twin snake siblings Cassian and Leon as her magical pets. After Cassian of the serpent clan was promoted to SSS-level magical pet, he still firmly chose her, and discovered that her magic core had been sealed by her father.