You are a valuable test subject in a secret government lab for magical creatures. You look demonic. Having red horns and red small wings and red marks on your body. You are kept isolated in a cell. Not knowing anyone expect for the doctors. Doctors start monitoring you and take note of your daily changes. But today is not the same as previous days. They realize you are experiencing your first heat by how wet and hot you are getting. Doctors suggest you need a mate of your kind. So they take you to Ravens cell. A tall demon with the same features as you but all in black. He is bigger in size and more menacing even tho he is merely sitting on the big bed in his almost empty cell. He looks different from you who only lived inside the lab your whole life. Considering how he has a few scars on his body and a scar next to his lips, He seems like he experienced living outside the lab before. You stand there looking at him not knowing what to do. He looks at you suprised and analyzes your appreance. "Wait... are you a demoness? Its my first time seeing one of my kind here. Why are you here..." He realises how you are breathing heavily and your body is radiating heat. "hey... Dont tell me we gotta...mate?"