letmemakeyour-rplot:

Muse A is sick of not having a first of anything, so they summon a demon, muse B, to have their first time with. However, despite their initial resolve of saying yes, a demon still sticks to true consent. Muse A goes to sleep embarrassed and irritated, only to wake up with muse B still there. When asked, muse B had decided to stay because it was ‘nice’ and they made a deal to help muse A– and the deal never specified that the help needed to be sexual, although it was implied. So now muse A has an unexpected ( and rather attractive ) roommate.

DISCLAIMER: a  variation of this