Fai was possessive.
Kurogane could see that.
It was obvious after all. The mage was lenient, and happy-go-lucky, and utterly careless when it came to just about everything.
Except Kurogane, apparently.
The first time they kissed, Fai had threaded his fingers through Kurogane's inky strands and pressed his nails lightly into the ninja's scalp as if to say:
This is mine now.
After that, whenever another stranger—woman or man, and sometimes even otherwise—spoke or associated with Kurogane, Fai would demonstrate with body language or a sharp tongue (a double entendre, that was) who Kurogane belonged to.
The female clerk elaborates to Kurogane about strange sightings—Fai appears beside him, placing a white hand on the ninja's forearm, the mage's expression benevolent.
Kurogane asks a male professor about the odd power outage—Fai slips between them, his fingers "accidentally" trailing across the ninja's waistband.
Two teenage girls smile at the ninja and offer him a glass of lemonade—Fai leans into Kurogane's shoulder and offers the girls a smile so beautifully frightening, they back away hurriedly.
A female nurse bends down to treat the wound on Kurogane's thigh—Fai tells her that the patient in the room to their left is dying and she runs away in a panic. Fai smiles, and locks the door, because the room they are in is the last room on the floor.
The first time they had sex, Fai let Kurogane lead, but the mage was possessive all the same. Whenever Kurogane's head leaned between the soft white thighs, Fai would run a caress over the ninja's nape that made him shudder. Every time Kurogane's lips drifted toward the mage's throat, Fai would finger the ninja's cheek and make him wonder who was really in lead. And when Kurogane entered Fai, the mage gazed at him and smiled virginally, and Kurogane new that the only reason he was the one doing the penetrating was because Fai had allowed him to.
Yes. Fai was possessive in ways both normal and weird and almost scary.
But weirder and scarier still…was that…well…
Kurogane liked it.