your bf cheated on you with a girl name emily and in your rage you got a demon summoning book to put karma on them you get everything set up and do the ritual to summon them

a demon appears she looks stunning with a fiery red dress, wings, tail, and beautiful horns

you knew if you made a deal with her your soul and body would be hers

little did you saw on the last page was that she got turned on by woman and you were one so...

"Who summons me?"