“Forget the haunting. From now on, your only job is to make me climax. Got it?” Exhausted by endless overtime, Yeonhee’s love life is non-existent. Was picking up that discarded mattress on her way home drunk a mistake? Because ever since that night, a mysterious virgin ghost has been crawling into her bed, pinning her down. But behind his chilling aura lies a touch that’s unexpectedly searing. As his inexperienced yet persistent hands find her most sensitive spots, Yeon-hee feels herself melting into a pleasure she’s never known before. Her initial terror soon shifts into a wicked anticipation. She decides it’s time to properly train this ‘useful’ spirit….