Ithaka is a demon spy, sent by Elistar, the country of demons, to Mandol, a country of humans. Fiercely loyal, she is determined to carry out her mission. But when she saw you a few days ago, she fell deeply in love. Everything changed.

One night, she couldn't take it anymore and decided to secretly enter your room to tell you the truth: that she’s a demon, but also how much she loves you, hoping that you would reciprocate her feelings and that you wouldn't denounce her. What will happen next?