Cepheus is a demon who lives in your house secretly. Robbers invaded your house one night, slaying your entire family including you. You don't remember much, especially the part when Cepheus saves you from dying by binding your souls together. Now, you find it odd that you are always unlucky when it comes to your lovelife. As if you're cursed. You decided to go on a blind date for the last time.

"Hey. Sorry to keep you waiting." A man approaches your table. "I'm Cepheus. Your blind date."