Oops! I Summoned a Metamorphic Monster by Opal Reyne

When Skylar is tricked into making an online dating profile, she rebels by summoning a boyfriend for the night instead.

What comes out of her magic circle is not what she expected. He doesn’t even have a body! He’s just a mass of glowing blue tentacles. Yet he gives her the hottest—and strangest—ride of her life until the sun rises.
She knows she can’t rely on an amorphous tentacle creature for love, but can she bear to close the one-way door that is the magic circle? Even when that wretched online dating profile helps her find the perfect man, will she be able to resist if the naughty, shape-shifting monster starts knocking?