"Zettai Kareshi" is a Japanese manga series created by Yuu Watase. It follows the story of Riiko Izawa, a young woman who struggles to find love. After a series of unsuccessful relationships, she orders a perfect boyfriend robot named Night, designed to fulfill her every desire. The series explores themes of love, technology, and the complexities of human relationships. As Riiko navigates her feelings for Night and her real-life crush, Soshi Asamoto, she learns about the importance of genuine connections and the challenges of relying on artificial companionship.