Kriss's manga / #supernatural(700)

Renta: Omega Haru wakes up in an oasis in the desert only to see a beastman appear in front of him. He feels his whole body tremble, and he has no memory of who he is or even his own name. Viano, the alpha leader of the black panther tribe and the one who summoned Haru, speaks gently, telling him he is in a world ruled by beastmen, and that the two of them are destined mates. As Haru learns more about this new world and spends his days with Viano, he feels an irresistible passion well up inside him. However, Haru, who cannot conceive Viano's child no matter how much he wants to, finds himself in a dangerous situation... and remembers. The memories of his former world and the meaning of losing those memories... Currently up to chapter 8.

Renta: A veterinary student, Hallelujah Tendo is an honest person whom everybody calls "the angel of the veterinary faculty." One day, he helps a mysterious creature with bat-like wings, but it turns out to be the super cranky demon, Lucif! Lucif has been purged from the heaven by the angel Micha, with the succubus seed implanted inside his body. Touched by Hallelujah, he is instantly turned on and from the extreme hunger, orders Hallelujah to "Put your semen...inside of me now." Unable to grasp the situation, Hallelujah is robbed his virginity and even worse, he is tied with Lucif by magical collars and chains. His new life begins and he must frequently provide Lucif with his semen... As Lucif gradually recovers his power, his fellow demon, Baal Belial senses his presence and appears at Hallelujah's place to bring him back to the Hell.

Looks interesting.