Kurumi, a high school girl, is drawn into the enigmatic Seven Mysteries club, led by the charismatic Shinji. Their investigation into the school’s secrets soon intertwines with a deep, mutual attraction that unfolds in quiet corners and private moments. As their curiosity about the supernatural grows, so does their passionate intimacy, blurring the line between clandestine exploration and romantic entanglement amid whispered confessions and urgent, heated encounters.