Kyuubi Kitsune no Hanayome

Rasen, the eldest son of a historian who has passed down the legend of the nine-tailed fox bride through generations. He, who should have been his son, is dedicated to the mountain where the nine-tailed fox was supposed to live, as a "bride" due to his daily laziness. What appeared there was a man who was as handsome as a human being, only he had ears and a tail. Rasen, whose body aches and wants to touch him just by looking into his eyes, is soon deprived of his virginity by the Kyuubi. Besides, he knows it was actually a sacrifice, not a bride...!??

(Source: Kadokawa, translated)

Note: The chapter count includes an extra story.