Her Majesty's Dog Series by Mick Takeuchi

Amane’s not like other girls. With her ice queen demeanor and naiveté, she’s become quite the misfit on campus. Even more unusual is her relationship with fellow transfer student Hyoue Inugami, the hottest guy in school. But the truth is that Amane is a powerful psychic and Hyoue is her guardian demon-dog, whose powers are fueled by her kiss! And when Amane lets her “dog” off his leash, no vengeful spirit is safe!

Hyoue Inugami might seem like your typical teenage hunk, but he's a lot older than he looks - 500 years older, to be exact. Long before he became Amane's loyal guardian, this demon dog served another master. The sorcerer Kaiso kept two guardians - Hyoue and Zakuro. When these two beasts start scrapping, who will emerge as leader of the pack?

By necessity Amane Kamori lives a life of secrecy. The only ones who know the truth about her powers and Hyoue's true form are her best friend Takako and her cousin Hayato. But when Amane's desire to help others exposes her powers to a stranger, the high school shamaness finds herself at the mercy of a manipulative and egotistical classmate.

Hyoue Inugami is a powerful Koma-Oni - so powerful, in fact, that a spell of binding has been put on him! Hyoue can only remain Amane's guardian providing he never says the forbidden words, but the problem is, he doesn't know what they are! He'd do anything to stay by Amane's side, but one slip of the tongue could mean disaster.

The kingon curse is broken - and Hyoue's powers are out of control! Heartbroken, he returns to the village where it all began. Meanwhile, Amane must take part in the village's annual ceremony. With no allies at her side and a malicious koma-oni on her heels, can she muster enough strength to track down her loyal demon-dog and bring him home?

Hyoue's servant-master pact with Amane is renewed but the koma-oni knows that doesn't mean everything's back to normal. Believing his feelings for Amane will only lead to misery, he distances himself from her, leaving her confused - and susceptible to a more aggressive classmate's affections!

Someone from Amane's village is out to ruin the young shamaness's life! Framed for a crime they didn't commit, Amane & Hyoue return to the island in disgrace - & this time, they won't be allowed to leave. Forced into fulfilling her duty as the head of the Kamori family, Amane finds that she is prisoner to her own destiny.

The identity of one of the ruthless attackers on the Kamori family has finally been revealed! But Amane's and Hyoue's troubles are far from over, as forces from all sides close in on our heroes to drive a wedge of doubt and distrust between them.

As Amane's wedding looms closer and closer, her friends grow more anxious. Attempts to talk her out of a loveless marriage are met only with her deep attachment to her duty - so Hyoue decides it's time to take matters into his own hands. But is it too late?

Despite Hyoue's protests, Amane begins the ceremony to become head of the Kamori family, but things spiral quickly out of control when Zakuro intervenes, and the identity of the one behind all their troubles is finally revealed. Painful memories from Amane's past are brought to the surface, and soon not even Hyoue can help her.

Distraught by losing Hyoue, Amane still manages to pull herself back together with the help of her friends. Aid from an unexpected source gives her the determination she needs to return to the island and confront her fears...but how can she face Hyoue when he doesn't even remember her name?