The white demon; Sya, makes a contract for a human wife. A "young girl" Ley, already on death's door takes down all of his ads & is the only candidate. After the contract is made the new bride turns out to be a boy. Sya interestingly enough has some kind of morals against sleeping with underaged kids & never consumate their marriage & raises him like a son. The boy's health declines rapidly due to Tuburculosis & a bad habit of picking poisonous herbs to make teas with. One day, Sya finds the boy dead in the garden.

Sya turns the Ley into a Frankenstein project, making contracts with other humans for their body parts or sences such as sight & hearing. The parts have the weird side effect of making the boy randomly transform into an adult man. When this happens, he is the husband & the demon is his wife. Otherwise the pass for mother & son, due to Sya bring indestinguishable from a woman unless naked.

Both Leh a handsome lesser black haired demon; Jya, are apparently in love with Sya, but Jya also has an equally complicated relationship with a Cherub he found that quickly grows into an Angel. The angel fell in love with him right away. Jya has strong sexual tension with the angel, who has the mental capacity of a toddler, but also seems him as an annoying disposible source of food. When Jya pimps the angel out to another demon & breaks his heart, Sya seemingly dumps him & takes the angel away. Jya for reasons he cannot fathom, feels compelled to retrieve his angel, whos love for him has turned to deep hatred. Jya explains that all demons were once angels & gives his "stupid bird" a choice between becoming a demon & death. When his angel rejects his proposal, he offers half his life to keep the angel he nearly killed alive.

As for Ley, he has completely different personalities depending on his age. As sn adult, he wants Sya to stop trying to risk his health trying to make his son whole & to love him as a man. He becomes increasingly posessive of Sya, jealous of Jya & the angel, mostly jealous of his own child self, & more infuriated with Sya for disreguarding his wish to remain an adult & accept him as a lover.

In between the demons' complex immoral relationships are the often tragic romances between attractive noble youths who make contracts with the devil.

e.g., in the first story, when the son is replaced with another in the room where he's supposed to service the mercenaries. If he was replaced all the time, then how the hell he wished for the man holding him to turn out to be his beloved? (because in this case no one held him at all); and how come his beloved didn't understand that that's the wrong person? If he was replaced only this once, then why his beloved is glad about this and says something about his father loving him after all and saving him in this way? Is making your son get raped and helping him only once - mercy?

When that guy raped the Angel boy, and Sya and Jya came afterwards. The moment the Angel boy enclosed his "tainted", covered in blood and injuries body in his wings, saying "sorry..." as if he was an eyesore and something so shameful and disgusting to look at.