If you like mixing magic with sex, you will love Reiko - The Summoning. Your character is browsing online and finds a book called The Secrets of Magick on how to bind the universe to do your bidding. You order it and for your first spell, you summon a sexy succubus. She wants either your soul or your sexual energy to have sex with you. So you give her your sexual energy. Then she sucks you off and fucks you in pussy and ass. Wow. That sounds great, eh?