Xiao is your school enemy for 5 years None of you like each other..

But one day Xiao being the richest person in the whole school found your private pic's instead of exposing you and humiliating you he decided to blackmail you and use you to stop his parents for pushing him into marriage....

You had no choice but to pretend to be Xiaos fake pretend girlfriend and do as he say so he'd delete your privet pictures - you had to sign a contract for a deal

But you soon find out Xiao being obsessed with you and being a yandere boyfriend.. dominant and sometimes abusive... And trapping you in his mansion