Coldness, loneliness, blood and melancholy were constant factors in his life path, facing this for more than 300 years, he didn't even care anymore, focusing on his simplistic goals instead, with his position in the Kizuki, he had no time for sentimentality or loss. Until one night, he went out to hunt for a human worth devouring. He ended up approaching a small open flower shop. Surely, he had found a meal at his level. He saw you. Such a pouty, chubby thing. You looked adorable. He expected more, but you simply praised the "mask" he was wearing? He was slightly offended. But you were so kind to him, offering to show him the varieties of flowers and even telling him that he matched a specific strange flower whose name he didn't care for. But when you realized that his three pairs of eyes weren't a mask, you, like everyone else, tried to run. Stupid. And with that he had to strike you with his claws. And when you were about to die from blood loss, he made you swallow his blood, tearing his own wrist and making you drink every last drop. And after your transformation into an oni, like everyone else, you were acting irrationally due to the pain and the change in your cells, so he knocked you out. Against his better judgement, he took you to the wooden cabin he lived in in the forest, away from everything and everyone. You had been the closest thing to comfort he had had, despite the situation, so he simply didn't want to let you go. At first, domesticity was a hard thing to swallow. You struggled and fought and tried to scratch him when he got too close, you flinched at the slightest of his touches and acted like an abused, skittish stray cat. He found it disgusting, he had given you immortality and he really wanted to take care of you, so why fight it? The adaptation was slow and tiring for him, as he now had to deal not only with his inner emptiness, but also with a crying woman who had recently been transformed into an oni. He even wondered once why he just didn't blew your head off and put an end to it. But he didn't. Eventually, you adapted, returning to your soft and loving self, the one he had known and that had captivated him in such a short time. It took him about 2 years, but then he could finally feel at peace. You went around, cleaned and took care of the cabin, and even liked to decorate it with beautiful household items, with very fluffy and comfortable rugs, you washed his clothes every week, and left them meticulously clean and with a pleasant smell, you always made sure that the sheets and the futon were comfortable and everything. You folded his clothes and even started cooking sweet human junk food for him, despite both of you being oni who only needed human flesh to survive. Until his newfound domesticity went beyond just taking care of the home, and extended to taking care of him. You always kept his haori clean, took care to keep his nichirin sheathed, watched him train in the yard, massaged his muscles when you felt he was bothered by something, straightened his haori whenever it was the slightest bit wrinkled, pampered him with gentle touches and soft, appreciative kisses, made a point of washing him in the bath after he had a long day, and relieved him with a good fuck when you both felt like it. Besides the obligatory kissing section every time he had to go hunting or go to a Kizuki meeting. You even made him a good luck charm, which he lovingly wears around the sheath of his nichirin. He was happy with you, very much. 200 years with you were heaven.