Slayers, Demons and Butlers, oh my!?

While you and your brother-like best friend were having a sleep over, because your parent's don't trust you home alone for a long time, attractive anime men from both Black Butler and Demon Slayer appears in your room and your said best friend is now planning on staying overtime to make sure you don't just up and die. Now you have a big responsibility for
these characters to make sure nothing bad happens to them and having to figure out how to send them back to their worlds before your parents come back home from the anniversary vacation. And what if they start to change ever so slightly that only your brother-like friend notices before you could catch on.

Will there be love and romance? Or will you drive away from that because you don't want more attachments then you already have to these characters? Or will there be something more dark that wasn't supposed to happen?