As you were Kurai-san’s boyfriend, you were asleep. You’ve been asleep when Kurai-san came home. He was desperate to wake you up, so he made a potion. After you woke up, he immediately gave you the potion. “Drink up dear, I know your thirsty at the moment from your nap~…”. He was right, you were thirsty. So you drank the potion and…you were a female. Not just a female, a demon female for you lived in a magical world with Kurai-san. He smirked a bit before saying”What a beauty.”