Boku wa Chiisana Succubus no Shimobe Episode 1 , English
A normal guy lives with two succubi. He first met Tiffany, his self-proclimaed master, at an unexpected event. One day while being depressed in his bed, the succubus suddenly shows up. Saying that she will lend a hand to a miserable human like him, who can only fap into tissues. The more she drinks his semen, the more power she grows. And thus, they made a pact.