An old game. Journaling game. 18+.  You'd 'summon' an incubus/succubus each actual night of the week, and through a few choices and story moves you'd come to an interesting ending.

It seems to have gone poof from itch, and my copy is about two computers ago for me. Wanted to play it... Moreover, wanted to study it...

Thanks, either way. 👋🏾