Because of your friends' stupid idea of summoning ghosts in the cemetery, you now have a problem. They summoned Beelzebub, who is a woman, and for some reason your soul and hers have merged, so she can't go back to hell and you can't get rid of her, plus only you can see her... One day has passed since they summoned her... she looks at the titles of books on your shelf and at the same time you check information about demons on the internet.