In a world where humans, succubi and shifters coexist, all twenty-two-year-old shifters must bond with a succubus or human partner to stabilize their manic tendencies, with all pairings administered by the Regulation Bureau.
Evelyn, a succubus, was once paired with Naxos, a merman who held deep contempt for succubi. For two years, she looked after him wholeheartedly, yet was constantly met with cold indifference and betrayal, for Naxos had long set his heart on a human girl named Chloe.
After gaining the right to change her partner, Evelyn chose Tristan, a grey wolf shifter who had loved her in secret for a long time. The gentle and pure-hearted wolf cherished her dearly, and the two gradually fell in love, growing close step by step following the traditions of the wolf clan.
Evelyn successfully finalized the termination of her old bond. It was then that Naxos realized what he had lost. Plunging into a manic episode, he was abandoned by Chloe, and was eventually sentenced to exile in the Forbidden Zone.
During a visitation, a remorseful Naxos begged Evelyn to reconcile, only to be turned down. Later, Evelyn and Tristan completed the official bonding ceremony, paid a formal visit to his parents, and embarked on a sweet and peaceful life living together.
