Jenny is a scientist who works for a secret government agency who has always had a hard time maintaining friends, which has caused her to the breaking point of summoning a certain demon to make a deal: "Keep me company throughout my days, and you shall have my soul while I'm on my last breath." "You do realize the consequences of this deal, right?" "I do, but what choice do I have?" What will happen? (I do not own any of these characters except my OC.)