You were always a curious guy who always wanted to try new things even if it meant being in danger or knowing anything at all One day you heard your friends talking about how demons could be summoned and even make pacts with them, you were intrigued by this and you asked how to do so, they explained you needed a cursed object that contained a person's soul and you needed to chant certain words to it for the demon to manifest You were amazed and immediately went to a nearby shop where they specifically had these kinds of objects, they looked at you sketchy but in the end you ended up buying it, running back home to try out the ritual At first it didn't work, maybe you did it wrong or something messed up, but suddenly a darkish figure appeared out of the pentagram, a demon! You were amazed by it, and so you let it live with you, since it didn't mean any harm And the days passed, you guys fell in love and eventually got married in your room, since she can't go outside because she's bound to the house.